Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b48ab572eec297…

MALICIOUS

PDF

69.5 KB Created: 2021-03-09 06:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8010248472424c38fb592db577150faf SHA-1: 356af440eb137b4f24629813b9191ab588581ad4 SHA-256: 26b48ab572eec297e21354f4d0bbdf67defabcbaa3eb1813fb10c6efebacd5f9
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to potentially harmful websites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crophysi.ru/award?keyword=thermal+expansion+examples+pdf
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/5da1d.pdf
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/ximun-maduzatugo.pdf
    • https://dibapanapuro.weebly.com/uploads/1/3/0/7/130776085/felimatenorape.pdf
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/motesexasemisox-puxefeworopude-metuzogaraliku-jijig.pdf
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/9210778.pdf
    • https://tofexozulemun.weebly.com/uploads/1/3/0/9/130969243/77ed69ce508.pdf
    • https://fazidojerax.weebly.com/uploads/1/3/5/3/135328618/ca011df4432.pdf
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/2842547.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kijelopazekune/rimifupamel.pdf
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_9aae4e00b4a14dd6859a5d72ca2466ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b9024480-6d89-4be8-92ed-2c95c09596f0/what_is_in_the_taco_bell_breakfast_crunchwrap.pdf
    • https://s3.amazonaws.com/nevovumowa/noribaf.pdf
    • https://uploads.strikinglycdn.com/files/abff01d6-e1f6-4271-8e31-2fb86167e9f6/40095200697.pdf
    • https://uploads.strikinglycdn.com/files/13d1c545-212a-43ed-966d-db2b6034f8c6/why_is_python_a_popular_programming_language.pdf
    • https://uploads.strikinglycdn.com/files/8aa109fb-05d0-46a1-b25a-8c93a5e3e104/how_to_tell_what_size_bobbin_you_have.pdf
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_5c73b3305253453e87f3aca9c72f8d63.pdf?index=true
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_c52dc93e91c04c83955baba23c84b66b.pdf?index=true
    • https://s3.amazonaws.com/suzixegazunow/american_football_vocabulary.pdf
    • https://uploads.strikinglycdn.com/files/31eeba0b-87bd-40e4-afaa-cbf144314f61/bose_companion_2_series_iii_watts_per_channel.pdf
    • https://uploads.strikinglycdn.com/files/faa22597-9857-45de-9623-ed93cf3f5e53/the_importance_of_being_earnest_2002_watch_online_free.pdf
    • https://s3.amazonaws.com/tomaxade/wow_classic_horde_mining_guide.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fee5.bin
41df5e3b15f1d1b83e43b8676f2f5fba736863457066c2abeef7e262d122cf86
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 5300 bytes