Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bcb0e07f462310…

MALICIOUS

PDF

71.7 KB Created: 2020-12-01 11:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 442f78f948d6b5afb3e027a073113524 SHA-1: 12adf6ea05952069abd4b4a04a91114c3affafd4 SHA-256: 38bcb0e07f462310923bc8c68cb7469d9d2332a57e980832c90214fc0df9da66
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is 'https://trafffe.ru/aws?utm_term=baptism+of+fire+witcher+pdf', which is likely used to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/aws?utm_term=baptism+of+fire+witcher+pdf
    • https://tafajasezo.weebly.com/uploads/1/3/4/3/134312542/tujevideka-duzif.pdf
    • https://cdn-cms.f-static.net/uploads/4459481/normal_5fb2af40404f0.pdf
    • https://cdn-cms.f-static.net/uploads/4465935/normal_5fa5102cb4657.pdf
    • https://tudanane.weebly.com/uploads/1/3/4/5/134596872/niwiremoxos.pdf
    • https://cdn-cms.f-static.net/uploads/4451023/normal_5fb91d9e1bef9.pdf
    • https://cdn-cms.f-static.net/uploads/4426954/normal_5f9e1e92a5ca1.pdf
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f8c4d68118d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0b912089-6a6a-4a1e-82ea-5805c82eb439/19802783461.pdf
    • https://uploads.strikinglycdn.com/files/418dc61b-d0e7-4990-adaf-56f900392b8a/70145455707.pdf
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc23cc72dd96f591838ad81/1606565067109/warlords_2_rise_of_demons_wiki.pdf
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc4e4ae4e98326c02aaa44c/1606739119481/ffxiv_summoner_guide_shadowbringers.pdf
    • https://uploads.strikinglycdn.com/files/3912c446-6c41-4894-b090-0f2462595f33/equation_of_axis_of_symmetry_parabola.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd027eef3361272aecec20/1606222463367/zugebixesopogoxolaxak.pdf
    • https://uploads.strikinglycdn.com/files/35176eea-2b45-44e2-a440-71583b2473b6/zogidiviwutufotex.pdf
    • https://uploads.strikinglycdn.com/files/fec451a9-c874-400a-8de8-2d76d3c7cca2/tizekorutefaguf.pdf
    • https://uploads.strikinglycdn.com/files/9f8871f9-91be-421d-af5c-0f387221e578/everydollar_login_problems.pdf
    • https://uploads.strikinglycdn.com/files/13e28f76-f49c-4d5e-b17a-d844a49c841b/73757868588.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db02.bin
120a8c57eaca081c1bec8600d80694154732c9e65e3d57103eeb6e6c859a5f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 5504 bytes
font_01_sfnt_off0000eda8.bin
aae481d6de462729c8a98b291cffe73457307db8d1fb036725583aa9499b8bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 10784 bytes

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