Malicious PDF — malware analysis report

Static analysis result for SHA-256 5070c496b2015bc1…

MALICIOUS

PDF

100.1 KB Created: 2021-04-03 21:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cf7fc4b2053a93a4f0c7db62bc8d3373 SHA-1: dec404e3c98182e8789b14160ea7a8571aeab5d1 SHA-256: 5070c496b2015bc164e1508e4ea849874cadc44973df827c8919e374a4a5b311
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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.
  • 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://bologen.ru/wix?keyword=niobides+krater+quizlet PDF link annotation
    • https://kedadatiwuji.weebly.com/uploads/1/3/4/8/134891749/7871dde0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368497/normal_5fe50bde78fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_602ad4df32ca8.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/9708740.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/gevMRid/retro_logo_maker_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/t7dMrjc/mansions_of_madness_2e_review.pdfIn PDF document text
    • https://widonudafedezu.weebly.com/uploads/1/3/0/7/130776490/bufeseruwot.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/fafusoxad_jixenudewos_rebolezed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_6044f72bca6f1.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/e7hEggl/54447224461.pdfIn PDF document text
    • http://wofixizufiw.22web.org/xurupigo.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/rodatixoz.pdfIn PDF document text
    • http://kojurebajalafaw.22web.org/59993803694.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/school_supplies_worksheet_for_preschool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6055b0fb891e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/residential_network_cabling.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/96867222824.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/how_to_make_a_sweatshirt_pattern.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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 14644 bytes
SHA-256: 4206ffef6027853eefcbb475da9adf09a721ca91d8e80fde01b38903a163d11f
font_01_sfnt_off000132aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AA 5168 bytes
SHA-256: 57b89d3eb35da50d954762fced2e29da30159dbc4639c53788621b10d5c99484
font_02_sfnt_off00014451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14451 12352 bytes
SHA-256: 131d061dab4f755ad810d7bf784697fa8d41f219a3cb27bc3240e194b6066886
font_03_sfnt_off00016e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E42 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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