Malicious PDF — malware analysis report

Static analysis result for SHA-256 0653e7878ef59a73…

MALICIOUS

PDF

110.3 KB Created: 2021-07-06 20:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ae829fe9b7d657b75bc415a54b95258f SHA-1: 9116983e68e90802d5a2223809b3144ff2e12252 SHA-256: 0653e7878ef59a732e3a9052ce4a1a6ddb17b756925e89098f5e91e5f14b8ff6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous external links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific intent beyond link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://banhangcongnghe.com/upload/FCK/file/razareleduligu.pdf In PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/epg8f5lptkdtr678padre9t5i2/lagogedoxoxorirutawiz.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b596a13e47---41017872010.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/90102316456.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/runawefu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/6aae84f36afc48e6ae07eff673494b53/xowukavorefa.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bae5ed53ce7---64457521978.pdfIn PDF document text
    • http://computerdoki.hu/user/file/1036707254.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/4b3ab2761bcbbc4732bf8cceb8046abe/28356361723.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f838072443---piduwuk.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/0d9558a357a3b75d7614b9827b8a9971/23414855365.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/4024926676.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ks2ae4gpitk6nltcebnjvjh8lf/mapivitakonanu.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/0atl79jjhphnsk0jc6sqn0tu76/bunaxutogenajukokaj.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7f7eec242d9fd492b563cc0b37414049/fafupeg.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16247379492264.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160858e369e995---sejazasufewelujera.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ljb0rrlcarfr72aca1rqkvegni/pirugupuxigaz.pdfIn PDF document text
    • http://chamdure.com/DATA/files/bidutalowizifebikamovu.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ecc2bf88782c69d83b74f7051db40400/fobibutexuvamijapamapuwar.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/7fb7fa653385cd95204b4aa393e36ae3/73508698661.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/4307eed7079b985f7f28c61cc688c021/32367332913.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab72afed15d---tenotajuvigob.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210701_144812.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/90190276918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=oozes+meaning+in+tamilPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00015b1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15B1C 22116 bytes
SHA-256: 41fd2de18c42f07986ee1183c965d7a7b25df4a712fd4541573327c2edc82f41
font_00_sfnt_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 28584 bytes
SHA-256: 6c47009c29e90dab2a489f58b055050989312483e38971502e90428dce872dc2
font_01_sfnt_off0001430b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000182a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182A4 10436 bytes
SHA-256: 3771195c0967d232060b2daaacaf01332481f50b44bca6d11ea09f6124ef8870
font_04_sfnt_off00019a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A53 4036 bytes
SHA-256: 86bd17feabdeb4c09080caf7c32bf6afce101a16867fb4e23c1d76b66689fb1b

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