Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0dfb09968c9f75…

MALICIOUS

PDF

85.6 KB Created: 2021-09-03 01:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 81d151ce9ca0ed13022ba7a5bd424746 SHA-1: 280ed5e9883f3800d2057104aaf96d1841c3d1ee SHA-256: 6b0dfb09968c9f75cde9c1f4f9646e0738c08c3247f77cf8927986787a8434f3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised WordPress sites, suggesting a link farm used for hosting malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely to trick users into initiating contact with threat actors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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) or Microsoft license-boilerplate 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 http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abaf6cd7d5b---sukunurifogitifunujape.pdf In PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/7241312620c53d36fd1e76668effc2eb/6699211136.pdfIn PDF document text
    • https://x-software.cz/data/file/13985413474.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/denejevobutupa.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/e4bqrjj5gv7mrj4sqg7lv7avj0/xabaregurotimaluseni.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/218971562.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/54166919773.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb452d03b25---tewoxe.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/63604117297.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210808065123_383836071.pdfIn PDF document text
    • https://webmenuplus.com/images/file/54084743642.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607594b8a2ecf---xutizepof.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/dobisumozetomizeb.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/safadixa.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/575c4811e567efc6d25e2e8576675b91/99681303193.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160821883a7fa2---puxaduke.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18492250775.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1623457133.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077409d89c70---vemunurosejak.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/uroni0hi7l0d46iubgpri36suq/sawawivudulitafifujelifep.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/94403232082.pdfIn PDF document text
    • https://andana.us/files/files/zurijibe.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085613834d85---34567208820.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/jorozupisoxefikerisudebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=iec+61508-5+pdf+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAE 19264 bytes
SHA-256: 10ebb86c40e71c3a5207af1d7982f1ceb23bea5dff84b248b5c4f334e9ce1315
font_02_sfnt_off00012d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6F 11012 bytes
SHA-256: bfd2b04b3c1bbec15ed36b27afbdeae95abe6fcf4bac3e48440d3f1b6bfcfb3e

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