Malicious PDF — malware analysis report

Static analysis result for SHA-256 3225d9ccf11efad5…

MALICIOUS

PDF

87.1 KB Created: 2021-09-04 04:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dc4bb3d2fb02d60cb03a4de80cef2191 SHA-1: 0018667fed174081611c95e7116ab5dcd67d84bc SHA-256: 3225d9ccf11efad598517f5f6024ce007bafbc076d6633d4c743746bc9e9da8e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting domains. These links likely serve as lures for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://computer-rudolstadt.de/upload/file/wuzolelokibifugalajov.pdf In PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec223c2b6d---55330829495.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/nuxokojivobotugemulofifi.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/mumubedugak.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///37133891140.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/67587039536.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/f8m1horqdvlk9j5asvvooa7cf1/61825466711.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d3e3dd8d---nixewuzokanej.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083221499e0e---56752693942.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/37932528108.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/kifizunogagukesa.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/12310691498.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d96aac3e7bfa58a119243053c5e8adb/mamudu.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4e45d39b4b97045b578b97428fa0421/73031621034.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/44036391970.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/wesotegodur.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/pasugopu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/cc063e12272e60ab81ddeea9aa980f30/18103985001.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/wepanojowuwejewugenupuno.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/11897405653.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/ccd38668030d5176c766bb2356e78f92/zopasipixofegeg.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-28/20210528192000286519.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/komarapivawurupibetove.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/18556286702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=gujarati+to+english+alphabet+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 23236 bytes
SHA-256: b978680be97e8822d0bb870c93f38235b6169bb594579273970d5d25cfa24f53
font_01_sfnt_off00011d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 11188 bytes
SHA-256: a280d47c1854165461664cbc4f46bef296bf2b73b584529742aeeabf06d86c2b
font_02_sfnt_off000136e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1