Malicious PDF — malware analysis report

Static analysis result for SHA-256 a966d0cac0f099ca…

MALICIOUS

PDF

83.8 KB Created: 2021-07-19 05:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6926a7da2b22a7e3d50e4a03cbdf057 SHA-1: 0d77fe908d851a292a068b392ae39fbc4fcbb400 SHA-256: a966d0cac0f099ca10a5bf63fa7e68841e66cf67a89091f656a226b76ebf48ff
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam and a callback phishing lure. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. No scripts were extracted, but the document structure and heuristics strongly indicate a phishing and fraud attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://eurocomm-italia.com/file/20473655751.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/cqed32ciddgqcqhs9ne2sh58tn/3775238774.pdf
    • https://promobryansk.ru/userfiles/files/76091382486.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b4d74b709---tevavojolega.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887304cfe22---zenedorimoka.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/b2fb59d7ded8358f4648b1444c8590d1/15320088488.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ed13a19e4---3474905941.pdf
    • https://groupburuemas1.com/contents//files/24456871028.pdf
    • http://df-foundry.net/d/files/xiwenatujadizaxalajoru.pdf
    • https://navliecky.net/userfiles/file/98785684923.pdf
    • https://amadesafar.ir/basefile/amadesafarir/files/sekuduwuzulajijedobu.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c83b6e758---bomuzo.pdf
    • http://goref.ru/files/file/14750653337.pdf
    • https://smsenerji.com/resimler/files/julimasonurepalotubavo.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a3da3ade339---6822111017.pdf
    • http://www.insight-assessment.com/ckfinder/userfiles/files/22760388775.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077e79590cdf---jutaxulekirovilika.pdf
    • http://metamorfoza-krosno.pl/userfiles/file/bisevuzakafipepopawinadu.pdf
    • http://lineshare.net/upload/files/20210718101648.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/5a5d852bbdaf77686aeac5ff4232cc5d/vepekevorunamab.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a06cc59d28---93387065445.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/1g219p3hjficu7of9a7ptaj2i6/wijedu.pdf
    • https://coatielectronica.com/files/61012606952.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=empires+of+the+mind+by+denis+waitley
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e3.bin
d6b255582828145e6a03c44415b2befd21e3d3d580f420bc78c8c08809351f69
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 17504 bytes
font_01_sfnt_off00010ed0.bin
cde6b05c20abf5abb84b9f8e5d151b5075bf462c27b017606332ad03191baa8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 11088 bytes
font_02_sfnt_off00012846.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12846 16792 bytes