Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e845c0315e98e0…

MALICIOUS

PDF

104.0 KB Created: 2021-04-06 16:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ac21b2fc8ab55631c5f77b248b8e75d SHA-1: b0e2384a1c10fc377d0c6d295a5124f86ea16c9b SHA-256: f1e845c0315e98e09209f338149105a4b91c738528146a82252bf286920a0c44
156 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 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 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.
  • 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://midufefew.ru/strik?utm_term=can+u+lose+weight+fast+on+keto PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484169/normal_5fd60345aa9e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6017616fec80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_603719acddd6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_6052fc8d108ad.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/systems_engineering_masters_program.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_603290e52fa26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_32df9b56d94548bc91cb257d2da0f746.pdf?index=trueIn PDF document text
    • http://dejibokakar.onlinewebshop.net/judowevojigimujumej.pdfIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_c355b94511844c6281b31386add3fa1c.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_d0ea20ca70cd4cb88553e84ffe230e23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/35120559078.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_63fdff39db2c4a748d271d9afa7a31d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/13545653603.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_76ae487517fb43cf9eed664100deb151.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/aprilaire_thermostat_manual_8363.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/behringer_xenyx_x2222usb_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/55251289161.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_a871646669304b12a4cce36c1d8c427e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/leraturisivinenagazexakon.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 2

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_off00015a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A8F 4992 bytes
SHA-256: da2ff7c7e076823e7740316c08693043e06c6b36fa794e063317b5aed82ad59c
font_01_sfnt_off00016ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BA3 10928 bytes
SHA-256: 6076f2e1626bc77645ba2539dce4c396ed66e84336fc4be98bc655acfeb329c2

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