Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85a3938c9e240b9…

MALICIOUS

PDF

117.2 KB Created: 2021-02-09 09:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 342438a7204115adfd8fb933f27ff5a2 SHA-1: 2d470621db70e2ee7b259a91c9be6b22d74c7aa2 SHA-256: d85a3938c9e240b9061bde3484e80351ec1f60d406bd2ca48b3210ad591d7971
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'maypoin.ru', which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body appears to be obfuscated or corrupted, but the presence of the external URI is the primary indicator of a potential attack.

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://maypoin.ru/123?utm_term=narrowest+booster+seat+5-point+harness PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485301/normal_5fd3a53997de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_5fdc14cb7d70b.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/jbd9d8C/ragaritujafuwes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458827/normal_5fe8f134806c8.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/7hjUTie/grumpy_cat_memes_monday.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444357/normal_6007d30116218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491926/normal_5fe7bb98374e9.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/FjjYXyN/stoney_s_pub_wilmington.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/Bje1jjm/bewizuzig.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/etjcYtE/97._3_the_wolf_listen_live.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magajavopisili.epizy.com/zuwajutakenafalanufakuv.pdfIn PDF document text
    • http://sakolizel.rf.gd/samsung_sm-_a205yn_manual.pdfIn PDF document text
    • http://puvumepuf.epizy.com/bol_radha_bol_song_mp4.pdfIn PDF document text
    • http://sotemapepuko.epizy.com/84677509872.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_off00018f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F67 5232 bytes
SHA-256: 35e0123017da4e6398879785efc2132b75487160ec10bc2b311792d37a793b0e
font_01_sfnt_off0001a14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A14E 11176 bytes
SHA-256: b98e77f1064b427114f8784570b10ca267bac3bfd216332b6c26f4e8457148be