Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b8f17e739c3958…

MALICIOUS

PDF

76.4 KB Created: 2022-03-30 08:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: e254f3f1ab6d97c84b94201527892c51 SHA-1: d66f8b7082b9c5a175600758c34e0ae7359f6dbf SHA-256: a8b8f17e739c3958345c59f0ef53f9d698f475605661c15843d767b582c2bf88
286 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 9

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 https://goldmenu.com/userfiles/file/negufasowexikibabod.pdf In PDF document text
    • https://defi128.com/userfiles/files/66193060228.pdfIn PDF document text
    • https://sewemojokevapu.weebly.com/uploads/1/3/4/4/134463988/abcbec32.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/42510296931.pdfIn PDF document text
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/vurirube.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16235f78d8ee29---2518120323.pdfIn PDF document text
    • https://tunizobun.weebly.com/uploads/1/3/1/0/131069832/nopotarebepimawup.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/venexejevetinoz.pdfIn PDF document text
    • http://apex-architect.ru/images/file/lizaxikanixiguwazawuliwug.pdfIn PDF document text
    • https://xegoguvaposa.weebly.com/uploads/1/3/4/6/134677344/75ac5a6678.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/jedasulafaxolo.pdfIn PDF document text
    • https://jasunibimagimuf.weebly.com/uploads/1/3/4/7/134733129/rufuxoxuvo.pdfIn PDF document text
    • http://kondicionery-himki.ru/upload_picture/file/67370548344.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/12156618584.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16205b9049f8bf---benilixax.pdfIn PDF document text
    • https://fajoxiwa.weebly.com/uploads/1/3/4/8/134893168/74559995f5db.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/11755700883.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/34038418365.pdfIn PDF document text
    • https://wufaderafezika.weebly.com/uploads/1/3/0/7/130776219/negiteve.pdfIn PDF document text
    • https://petgears.com/app/webroot/files/file/86178290666.pdfIn PDF document text
    • https://varoslod.hu/kcfinder/upload/files/nawutoki.pdfIn PDF document text
    • http://arborspringsforestry.com/img/files/berexekoborix.pdfIn PDF document text
    • https://lovig.co.za/YmrXLWy8?keyword=harley%20davidson%20service%20cost%20south%20africaPDF 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 extracted file (font_00_sfnt_off0000c466.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c466.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC466 17240 bytes
SHA-256: a5aa29c23a68467ea1cac03774d2e799e264b82ad9ae74ed4e20955bfd0e7f0f
font_01_sfnt_off0000f187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF187 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 10844 bytes
SHA-256: 744a410531a4abb8abd9e78a95a857842392ba30abf575feb93b567ffe4f7075