Malicious PDF — malware analysis report

Static analysis result for SHA-256 3648d1aae70f0c16…

MALICIOUS

PDF

62.5 KB Created: 2021-06-02 04:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 904bff69c6ca5c9ead0ecd2cccd3410e SHA-1: ed33319b38310b2e04cabef875a8a648cd79c935 SHA-256: 3648d1aae70f0c16b20e280d2aa5b229afe9fe86169120a52e3dca1f423dd163
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The primary external URL, 'https://crysiq.ru/pbw?utm_term=3d+printed+house+builders', suggests a phishing or scam attempt by luring users with a seemingly relevant topic. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8467

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://crysiq.ru/pbw?utm_term=3d+printed+house+builders
    • https://cdn-cms.f-static.net/uploads/4466367/normal_6010ab65d5cc9.pdf
    • https://difiraboveju.weebly.com/uploads/1/3/4/5/134508976/7cfa4f.pdf
    • https://cdn-cms.f-static.net/uploads/4378607/normal_60468780dbbab.pdf
    • https://dexajaxalujum.weebly.com/uploads/1/3/1/8/131857565/537a297b014.pdf
    • https://cdn-cms.f-static.net/uploads/4407314/normal_5fd6ed6f6438f.pdf
    • https://cdn-cms.f-static.net/uploads/4384649/normal_606875a7c5fd5.pdf
    • https://cdn-cms.f-static.net/uploads/4416656/normal_602c5bbb2edd4.pdf
    • https://fodolirikixubug.weebly.com/uploads/1/3/5/2/135297927/komomawereset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca78e9fe-c0a6-4b2a-a045-2e72d4f4b698/windows_7_excel_shortcut_keys.pdf
    • http://nerobedevu.pbworks.com/f/dogapipapekivukebokilem.pdf
    • https://uploads.strikinglycdn.com/files/4fb97c74-f0fc-411c-9821-081d3328282b/92648598631.pdf
    • https://uploads.strikinglycdn.com/files/3ad6cada-715a-4805-b49c-dcb5a29d6238/psychology_12th_edition_myers_dewall_free.pdf
    • https://uploads.strikinglycdn.com/files/31ec8a97-ff81-4009-9713-5572d8a049e0/how_long_do_non_filers_have_to_wait_for_stimulus_check.pdf
    • https://uploads.strikinglycdn.com/files/f6b509f6-8826-427b-85a1-8e2638da842c/why_is_statehood_important_in_international_law.pdf
    • https://uploads.strikinglycdn.com/files/35caad1b-f185-4251-9273-86c4bb9698e6/22973921767.pdf
    • https://uploads.strikinglycdn.com/files/d24535fd-c1b3-4491-b411-a21babb1e4fb/nogegemebiwisumu.pdf
    • https://uploads.strikinglycdn.com/files/a80dbd71-e8d3-4e2c-b57f-97c2c5be5338/timeless_treasures_certificate_of_authenticity_look_up.pdf
    • http://paderukut.pbworks.com/w/file/fetch/144440439/how_hard_is_the_ma_permit_test.pdf
    • https://uploads.strikinglycdn.com/files/5e21b5cf-5d27-48fb-a833-a55d540937f6/manual_del_futuro_millonario.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86a.bin
27a8543d12e58f99702134216bff589ce46a6ed68f4a1c43fc0d3b5e97dcdb14
pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 5044 bytes