Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd91fc71768c4d0…

MALICIOUS

PDF

94.7 KB Created: 2021-03-22 11:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d269d93959f2d4b1157ad11f530904fe SHA-1: 79f3bc2ce49d515ccf405e987d2eb2ec32db4748 SHA-256: 2fd91fc71768c4d0fd3e122033930ce26e4d7f5dcfcc02e6c52ce8d7929c8dbc
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically 'https://dafemum.ru/wix?keyword=webelos+pins+2018', which is likely a phishing lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The document body, though heavily obfuscated, contains text related to 'Webelos pins 2018' and the authoring application 'wkhtmltopdf', suggesting a social engineering pretext to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/wix?keyword=webelos+pins+2018
    • https://cdn-cms.f-static.net/uploads/4479433/normal_6053db8c92b2a.pdf
    • https://cdn.sqhk.co/miraroki/Ojj4sTU/maxabevutajekixe.pdf
    • https://cdn.sqhk.co/tevunufoba/vSjaijQ/9441153915.pdf
    • https://pinipinemijik.weebly.com/uploads/1/3/0/8/130814728/veziputazaxu.pdf
    • https://cdn-cms.f-static.net/uploads/4471971/normal_600c74e05b351.pdf
    • https://static.s123-cdn-static.com/uploads/4417815/normal_600913f024712.pdf
    • https://cdn.sqhk.co/jijatidos/hb0jhhd/hymn_of_grateful_praise_lyrics.pdf
    • http://snt-br.ru/msi_970a_g43_plus_cmos_resetuzj4s.pdf
    • https://rejosunofefi.weebly.com/uploads/1/3/0/8/130874376/4408861.pdf
    • http://neuroncraft.online/lagewilatemehk1p.pdf
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/wufeb.pdf
    • https://xevogivuzu.weebly.com/uploads/1/3/5/3/135350373/43eb0a.pdf
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/a5a48a64e2ee6.pdf
    • https://cdn.sqhk.co/pefapalotux/Khaibnr/android_cell_saga_tier.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fewifuwu/games_like_alien_shooter_for_android.pdf
    • https://s3.amazonaws.com/zisulamisozoto/vilageradigixuja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b0.bin
00c1cda6d8f81e7b67769067f3cbbf2df78db734ca012b80a7c26d3e58d549ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 26652 bytes
font_01_sfnt_off000134af.bin
4ef45fe2f1d211cc1390c6968143cdb500c7c1d4d2c93b8f18dcbbbfd6d95659
pdf-font-stream PDF embedded font (sfnt) at offset 0x134AF 5180 bytes
font_02_sfnt_off0001467a.bin
6d77f4c464ed4cad0f6caad1f8f99fd96ec96818964767d488718f001cacee12
pdf-font-stream PDF embedded font (sfnt) at offset 0x1467A 10808 bytes