Malicious PDF — malware analysis report

Static analysis result for SHA-256 76005a46a56d0d68…

MALICIOUS

PDF

98.3 KB Created: 2021-03-28 13:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 82dc4f9cdb2042bd21a239310eee374f SHA-1: 5797e4c38b84e51624705183c82403e3b09e93e6 SHA-256: 76005a46a56d0d68cab504dc190b3f545c65176cbbea60b6d43b0783445037c3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/award?keyword=pdf+annotation+apps+for+windows+10 PDF link annotation
    • https://xazalonabi.weebly.com/uploads/1/3/6/0/136086847/9927037.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/bjchct6/28052886123.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/jogdKhQ/91705233998.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/7047531.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/6995842.pdfIn PDF document text
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/zefubuzovores.pdfIn PDF document text
    • https://jigaposu.weebly.com/uploads/1/3/5/3/135397088/joditiz.pdfIn PDF document text
    • https://jerusofiv.weebly.com/uploads/1/3/0/9/130969981/f263d995291.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/agarwood_plantation_method.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/92312170550.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/sojolefizofimojok.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/whgRSso/holy_roman_empire_political_structure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/851847b8-7919-411c-ad6e-23f05f7aa0f3/jensen_boat_radio_manual_ms3a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ac53dd-52f6-46d2-8845-cfd3f2415b46/2016_toyota_corolla_le_eco_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c76911b-4e80-4dbf-9cec-925953e4b020/watosa.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/porque_estudiar_administracion_de_empresas_yahoo.pdfIn PDF document text
    • http://faduguxilanapeg.epizy.com/baal_veer_episode_821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d437d97-469f-4e8f-acd7-0867c830ea0e/are_monster_tacos_vegan.pdfIn PDF document text
    • http://biwedudomobi.epizy.com/4569213544.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000142bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BB 5288 bytes
SHA-256: 15a0f47a137af3511313472cab0bcc4b6cb1096faf7fb4714850841d9ec884db
font_01_sfnt_off000154e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154E4 11632 bytes
SHA-256: e84a8cef97b19fc1c409b0a37798fc91e43f82967888b60e3955db611e71fe4f

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