Malicious PDF — malware analysis report

Static analysis result for SHA-256 574e8c297a3809e9…

MALICIOUS

PDF

72.6 KB Created: 2021-09-29 00:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 907ba4d70d9f34055b5b3406e2d2d700 SHA-1: d25fb9aabd3dbe91c86bdf3dbf2b86d79e5680b8 SHA-256: 574e8c297a3809e92348db9f830844c30efaa0b29031c5148e720324e3f02e02
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, with specific heuristics indicating it's a callback phishing lure. Although no executable scripts were extracted, the document's structure and embedded URLs suggest an attempt to trick the user into initiating contact, likely for fraudulent purposes. The presence of numerous embedded URLs, many pointing to unknown domains, further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://littleitalypizzany.com/nbloom/fckuploads/file/217329606.pdf In PDF document text
    • https://7mark3t2-7aya.com/contents/files/nevizifepagexenedariwiven.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/48445003192.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/rukaxojidezunegoxekezida.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/gikawede.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/fimopugiluwalonutolenawi.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/58602489239.pdfIn PDF document text
    • https://afma.pt/site/upload/file/gerovuwuxoxomiralufime.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/09225436c02392d5f23a0fabe1940134/nodonudatogusonekanobo.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///zapef.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/57545294313.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/94492953296.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/64104486124.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/35874712343.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/4143929946.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/volozixijawume.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/dagenigof.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/42870051686.pdfIn PDF document text
    • https://vanchuyen.pvl-soft.com/site/files/bapiwipim.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/wefapixenowizuzeweranaru.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/wibosisujeloneba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=decimal+to+hexadecimal+conversion+examplesPDF 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_off0000b715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB715 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2C 10948 bytes
SHA-256: 1f34d2625c82d496b4c292644b94d082b2f5c2d6c4821ed974dad47b528e6bd7
font_02_sfnt_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 17252 bytes
SHA-256: c52b162f1f4475784b05a7431106015e2eb5ff6b141cf2a919107cf079e32852

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