Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b202d398492ccc…

MALICIOUS

PDF

81.9 KB Created: 2021-03-15 14:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2549e73fa5b0824b911be00ebfdaaaa1 SHA-1: 383a2b67ff66642cf5b425ae8df96fa0a73f310e SHA-256: e1b202d398492ccc8b9b8ae1635ce640afae5cef7da7dd6146e8b359edd2ba4b
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 0.9996

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://pelibifir.ru/wix?keyword=the+electoral+college+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5ff1b5ff09cd0.pdfIn PDF document text
    • http://new-volosi.ru/12777440445zxscl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5fc9a5102f87b.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/jf0EZgf/download_anime_tiles_piano_musik_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/zDdighj/imf_world_economic_outlook_report_october_2020.pdfIn PDF document text
    • http://uscarins.info/api_570_certification_body_of_knowledge8gnc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450730/normal_5fcf9f8b66508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_603fd239ba00f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380237/normal_5fd052d9bcce4.pdfIn PDF document text
    • http://hh666o.site/xuwamakimovosozebagipibov3a9l.pdfIn PDF document text
    • http://fionainthefield.org/jamurusegojoxepinigatoz7x9ov.pdfIn PDF document text
    • http://re-capital.ru/ledazatedipa16fob.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/AijeJhd/kifigor.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/idJRgl5/jijakipafisebipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fd80a959004b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_ad9fe52cf8874665b339aee88320268f.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_7bc73f0f4b4b4ea6a232d603e47ac3ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panokojol/53361502580.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_36788dd192b44070b4277fdaa588e280.pdf?index=trueIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_471e5bf82bd44c41988e32aeac5864d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/xikit.pdfIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_f8bda842bfe14a7698eae1828a0181f9.pdf?index=trueIn 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_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 5164 bytes
SHA-256: 9fc5bb7c53a7a526a9807165a8bfc1f0c5941c040af721557ea21409879583eb
font_01_sfnt_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 11040 bytes
SHA-256: 8a90302755d046d6a2840b7444c300c050237433a5dd2282eb7afef2b3148781

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