Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f09f42873ddcb6…

MALICIOUS

PDF

71.7 KB Created: 2021-03-11 12:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dcc40ba3f561c2622dc23244063e464e SHA-1: 86265a8637e7c8e7b2c1ad8d01cd60d98646ddec SHA-256: e5f09f42873ddcb699a36640859907501c088e40729e9be4098d02ad9e960d60
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 0.9991

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://midufefew.ru/123?utm_term=atlassian+jira+administration+guide PDF link annotation
    • http://brettlockhart.com/863591856549nt5i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_6008dc632cc83.pdfIn PDF document text
    • http://perfectiona.online/pioneer_sx-950_new_pricem0m7j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_6049a84872275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_601a1b7babe71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472204/normal_5fe8763321537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_603c73f87077f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_600dd023155cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fd80b93f168c.pdfIn PDF document text
    • http://flymoney.net/why_is_my_roku_stick_not_connecting_to_the_internetypzn9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_601ec9bf35938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_601c970ed15e0.pdfIn PDF document text
    • http://soul-felt.com/pubemaxanrfbsu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5ff849ea4e121.pdfIn PDF document text
    • http://nomokosu.iblogger.org/93248915671.pdfIn PDF document text
    • http://oneshops.space/tegoredixebomye9bf.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/jujadodedaruxix/tegifa.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/62965179951.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/arithmetico_geometric_progression.pdfIn PDF document text
    • http://nuvezutonotogev.epizy.com/31571180019.pdfIn PDF document text
    • http://zetaginapuvube.rf.gd/cignal_channel_guide_2018.pdfIn PDF document text
    • http://kuvorewenosabe.epizy.com/23282796098.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/11949628044.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/66945000561.pdfIn PDF document text
    • http://kenubuw.epizy.com/billian_billian_mp4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 5212 bytes
SHA-256: 85d0406b808ad256f6d720bbce2ac49bd0daa3f5553ce95c6aba3ca69b5a9e24
font_01_sfnt_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 10532 bytes
SHA-256: b707c895e7cdc20bef584e7dedfb0d786fc016db5b68da40eb9310af4f5410fe

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