Malicious PDF — malware analysis report

Static analysis result for SHA-256 f051d1729cfa4739…

MALICIOUS

PDF

78.4 KB Created: 2021-03-09 16:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f53d22ef9a37e94d682dadef66ebfec4 SHA-1: 52c41ddf2772696f4a7bdb30e490c9d4149429c7 SHA-256: f051d1729cfa47396762aff301745773fb1d81c585cfd682b986e533fb3518fe
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://xajibur.ru/wix?keyword=you+wa+shock+lyrics PDF link annotation
    • https://cdn.sqhk.co/kitujesijak/ieheggK/startup_company_marketing_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/satofurijob/aighdhh/57712281775.pdfIn PDF document text
    • http://babbieshop.ru/fixutolusv4e.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/egdhjhe/95399142479.pdfIn PDF document text
    • https://rogiguzuma.weebly.com/uploads/1/3/1/4/131438844/bidumuraxu_wuripofalu.pdfIn PDF document text
    • http://letxxnx.org/najefetejixewijihraie.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/i7yXhiI/90925025060.pdfIn PDF document text
    • https://cdn.sqhk.co/dudosugebo/jgtgh2W/after_burner_climax_xbox_one.pdfIn PDF document text
    • https://koxiguxizabi.weebly.com/uploads/1/3/1/1/131163763/2547221.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/1290464.pdfIn PDF document text
    • https://cdn.sqhk.co/nunexijezep/ge8ijie/lakixetujobugigude.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/manefase.pdfIn PDF document text
    • http://nexudabux.22web.org/jegutalubopapesovofeze.pdfIn PDF document text
    • http://vostokzapad.su/diablo_3_wizard_tal_rasha_disintegrate_build5mv15.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/cFUbjfR/effective_classroom_management_techniques.pdfIn PDF document text
    • http://remont-pc.website/assault_android_cactus_2mul3o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegudonokor.epizy.com/59656985234.pdfIn PDF document text
    • http://gimapetabotoza.rf.gd/99093063234.pdfIn PDF document text
    • http://lokimutopilar.epizy.com/uc_browser_pc_windows_7_2017.pdfIn PDF document text
    • http://xojaxalevigob.epizy.com/nizow.pdfIn PDF document text
    • http://repafow.epizy.com/62512382391.pdfIn PDF document text
    • http://xujogefup.rf.gd/63576219335.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://scripts.sil.org/OFLIn 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_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 4732 bytes
SHA-256: 0c524733b9314b65c65f4b78aebb70ac5b951604c0c59b51f080b9e1b0825b1f
font_01_sfnt_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 5104 bytes
SHA-256: da2a280e56a4d2a81d62e062100d50f9d9a6945d3165edc022b0944c4f2efbba
font_02_sfnt_off000107c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C9 10384 bytes
SHA-256: 04e496c0d79a90c053dc9fdfd7030630cfad7c015700cf49812c671a4e2b3b0b

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