Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae9406de07a2889…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 07:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f10817f01492dcdd00389dc9eada2834 SHA-1: 2dda047bbb7ba8d83a7bf956887b7c6af4f60fbc SHA-256: fae9406de07a2889aba4d19b38091a9afc6a71d7c8b7fb3bccaaebd838089081
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://wastran.ru/uplcv?utm_term=final+fantasy+tactics+apk PDF link annotation
    • http://mini-garden.ru/userfiles/file/87981330879.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/sisotipafilapuzizi.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/rekigogazenetunexabixime.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/sizogiduvuwuloref.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/pisafamegogubuvelixok.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/86305581820.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/vomegapojusudedetileno.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/jared.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109090127536527.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/68700140101.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/49893141222.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ec2261bcdb936c41fea3a78e01b38db7/gekofogir.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/bopivazujibaduged.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/v2kctajkesn97eti5948igpql0/22324901966.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/zazujip.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/59636685777.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/92700253847.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/rudijaresuzix.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/sasovibiw.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16142cd1fafce0---11093884071.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/6419d168b9c0e844b218e8e848545efd/82561399899.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/41280289843.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/dananeda.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/lerujanovibanune.pdfIn PDF document text
    • 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_off0000d167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD167 21032 bytes
SHA-256: ce591aed5d70bb20f21d9fa0e503ee6db081459f87456e5f16cf482115bf4137
font_01_sfnt_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 10304 bytes
SHA-256: 33c9db6718e497c1596d57e15fb4e4eec3138a2e7c820641d500b954463d25d7

Open this report in the interactive analyzer, or submit your own file for analysis.