Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a8c4b999dd1aa0…

MALICIOUS

PDF

84.9 KB Created: 2021-03-18 22:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ddf53187d6dd74bd35f2256a735bf59 SHA-1: 10ca1b2ee732e6ec411867f26ae8fabda53fc92a SHA-256: 26a8c4b999dd1aa0d5270827daaeeda44144ae2fad01fc73ec830dc605e9a056
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 0.9998

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 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://xezojetit.ru/123?utm_term=geophysical+research+letters+submission+guidelines PDF link annotation
    • https://wanezevidika.weebly.com/uploads/1/3/4/5/134588498/dolegomelotiwafudi.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/9528284.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/saxefi/18041992948.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_d798a67a40134e1eae93bd749736e5dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4027341a-54f9-4579-8c8e-b55f7739a49e/zefawu.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/lugibop.pdfIn PDF document text
    • http://tefuwileb.rf.gd/pavamafe.pdfIn PDF document text
    • http://jugixumob.rf.gd/85473384138.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_24b058e2b8734e5e91ec5ff7c6910b57.pdf?index=trueIn PDF document text
    • http://povujijizota.epizy.com/78412406272.pdfIn PDF document text
    • http://mewudupite.epizy.com/42770305837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc33d732-a091-4944-8fc3-3ffee16b1bca/apollo_250_dirt_bike_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61806df-ebd7-491e-aa45-0ae7fb659e7d/naxipuxonekavipomedaviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2197535f-43c5-46b4-b717-a713cd27dc17/mijudagub.pdfIn PDF document text
    • http://zagaturatok.epizy.com/agnidevan_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/debt_to_income_ratio_calculator_spreadsheet.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_b5feaa0703d14317b0cabd6ed647fe04.pdf?index=trueIn PDF document text
    • http://vukimikopid.epizy.com/dunkin_donuts_calories_large_iced_coffee.pdfIn PDF document text
    • http://zixaxonenugoko.epizy.com/folder_template_ppt.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 5760 bytes
SHA-256: 9a3b78e10efb8c1d104ca2fe579700c87bf74bd5f22d8da9e5cfc776f8e94a8d
font_01_sfnt_off0001086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 11372 bytes
SHA-256: 2771156bbd6946e17ab2bf12a077b546edc0431a3db547a64dac7fcd72da492e
font_02_sfnt_off00012f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1E 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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