Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc60cd9af2ed0cf…

MALICIOUS

PDF

85.3 KB Created: 2021-03-31 18:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 84c7b583115d30fa0065c5e2a9065cdb SHA-1: 5439b500e44c048c96741bbaf6e3934a11e4d24c SHA-256: 3dc60cd9af2ed0cfd9be5afc67b751921483485b646a3df5bb0d0f51f7bcfec3
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 0.9994

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://fokemale.ru/award?keyword=africa+toto+piano+pdf PDF link annotation
    • http://onlinetiser.website/why_should_we_hire_you_information_technologyq1u93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_601802f475326.pdfIn PDF document text
    • http://youla-24.cc/monsters_inc_explaining_meme_templatehryu2.pdfIn PDF document text
    • http://sale20.site/genie_model_2024_wont_openfy365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449990/normal_5fe1c11db30c9.pdfIn PDF document text
    • http://jezuxomedoz.iblogger.org/how_much_does_a_grief_counselor_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_602bf59a15086.pdfIn PDF document text
    • http://setlyb.online/gogafotubusavavoku9oa2a.pdfIn PDF document text
    • http://o-karte-kopilka.com/dewalt_pressure_washer_instructionsgb8dj.pdfIn PDF document text
    • http://milukiwidawedej.22web.org/asme_pcc_1_2020.pdfIn PDF document text
    • http://meetlait.pro/58207450516atbih.pdfIn PDF document text
    • http://tohld.in/zuzibakegazesokugemedunazo058p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fe5df98979a8.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/8a624783-6fe4-4a1b-b1fa-2f5b9e306283/87647474531.pdfIn PDF document text
    • http://tuzipegubeluwo.epizy.com/28229932846.pdfIn PDF document text
    • http://zemikajinemoxi.rf.gd/26458523220.pdfIn PDF document text
    • http://sefakazoporemad.rf.gd/pukoxesekune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcdf1c3e-012c-4758-94cb-88d0147a50d0/4561839892.pdfIn PDF document text
    • http://koxosam.rf.gd/dibonowonon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45124116-ff10-46b2-b730-4c80dba5e044/rajeki.pdfIn PDF document text
    • http://zimekinolidi.rf.gd/11662427146.pdfIn PDF document text
    • http://siwebojik.epizy.com/usps_tracking_number_format_9114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2b14f1-e340-47d8-bd39-f6d833472753/16697481897.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_off00010e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E81 4928 bytes
SHA-256: a93802de5e041f2636d39482c08f67a66019271c21c059f168473e12a500d2de
font_01_sfnt_off00011f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F59 12012 bytes
SHA-256: f9a581ae765614af8183d372583f4043f999a176c197061d6ded91acf530947b

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