Malicious PDF — malware analysis report

Static analysis result for SHA-256 6708517a91043518…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 16:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d806e8811a43d3dd7bf550a6b613f82 SHA-1: 9244bce4aece6d34b77e25dcad5f0d4226d5ead8 SHA-256: 6708517a91043518906b937fb922f37413b9e6d97a5eed82d7cc020e59ba5fe5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'https://golowaki.ru/award?keyword=atkins+phase+1+recipes+pdf', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, suggests a lure related to 'Atkins phase 1 recipes pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://golowaki.ru/award?keyword=atkins+phase+1+recipes+pdf
    • https://cdn.sqhk.co/supekolev/IhbU7tx/chapter_4_the_human_skeleton_worksheet_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4366369/normal_60122921a4209.pdf
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5fd1092fbf7b9.pdf
    • https://static.s123-cdn-static.com/uploads/4390350/normal_5fe5d8b084eaf.pdf
    • https://cdn.sqhk.co/pasovevutuvi/jjehg1I/xividilunagodarutoba.pdf
    • https://cdn.sqhk.co/farafakilof/gx74uhd/dauphin_way_umc_mobile_al.pdf
    • https://cdn-cms.f-static.net/uploads/4418391/normal_60411148132e8.pdf
    • https://cdn-cms.f-static.net/uploads/4387428/normal_6059a0be20d38.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/JS75mjh/wilefulumikojoxibazaderur.pdf
    • https://cdn.sqhk.co/papowepu/hhigb0L/5441352220.pdf
    • https://static.s123-cdn-static.com/uploads/4417525/normal_5fc8694c84ba0.pdf
    • https://static.s123-cdn-static.com/uploads/4458826/normal_5ff49773c443a.pdf
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5ffd730eef1a7.pdf
    • https://cdn.sqhk.co/tazifawixax/hbihjgW/warframe_limbo_defense_build.pdf
    • https://cdn.sqhk.co/juxerawabuf/LGgePgi/8449557206.pdf
    • https://cdn-cms.f-static.net/uploads/4451021/normal_601a29e3c20b6.pdf
    • https://cdn-cms.f-static.net/uploads/4484993/normal_603690b204796.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/281f8766-b45d-47b1-be2c-ebfc5ff92262/woodcock_johnson_iv_score_descriptions.pdf
    • https://uploads.strikinglycdn.com/files/d54d680c-ae1b-456c-9a95-a6ed825008c4/lojuvenikinerozunizu.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_off0000f43f.bin
2717a0d636387c64facdb038d02433027d8fa7a13a8e25cfd5e56574b47ab008
pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 5316 bytes
font_01_sfnt_off00010655.bin
3d074a89f0726fbb9ad5681d4d043434cbe7e19b69f65428bc22f2e943e88f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 10952 bytes