Malicious PDF — malware analysis report

Static analysis result for SHA-256 8823184c63611dec…

MALICIOUS

PDF

77.6 KB Created: 2021-03-13 16:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e64f3e447d8a18f86079daf3121e96c SHA-1: 35278482ea1d23690ecb0855a9aee513ee868978 SHA-256: 8823184c63611dece783d126c932a83453b6aa1cf88091e6d174c9c2a0b86d75
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, likely intended to redirect users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, with the document being flagged as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a second-stage payload or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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-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://soxebez.ru/award?keyword=chega+de+saudade+pdf
    • https://fepobewute.weebly.com/uploads/1/3/5/3/135386667/e24d6.pdf
    • https://puxonuge.weebly.com/uploads/1/3/1/3/131383548/2de123f1.pdf
    • http://connexion-amelii.xyz/11922458535sluxk.pdf
    • http://scandisvet.ru/remasewg71n.pdf
    • https://fejajeger.weebly.com/uploads/1/3/4/6/134614243/nomejomomewij-likagavasosufa-wovamosafipo.pdf
    • https://wurotifaji.weebly.com/uploads/1/3/4/3/134315076/b90795383ac9f.pdf
    • https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/afe329e4c53.pdf
    • https://cdn.sqhk.co/nurofiwele/ejiiihb/8410155039.pdf
    • http://afracheat1.xyz/descargar_musica_los_tucanes_de_tijuana_mix_corridos9pmos.pdf
    • https://pisubemiduburor.weebly.com/uploads/1/3/1/3/131380627/a25c925aea94f2.pdf
    • http://topdouche.xyz/mission_mangal_songs_ming._segoevb.pdf
    • https://wiwofuda.weebly.com/uploads/1/3/2/3/132303082/2ce0b.pdf
    • https://cdn.sqhk.co/pisupuwov/hJgeVib/73555902417.pdf
    • https://cdn.sqhk.co/fapetemiji/ibMhjgd/68737371635.pdf
    • https://visumosibe.weebly.com/uploads/1/3/0/8/130814065/mikuxikapew.pdf
    • https://ronogutelujevur.weebly.com/uploads/1/3/5/9/135956648/mafiretiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_6a30083675b547d88d3443790e4ffce4.pdf?index=true
    • http://xefavab.rf.gd/23037019967.pdf
    • http://gigigij.rf.gd/moliki.pdf
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_5af867067d3346ee9065b656fb4bc0bf.pdf?index=true
    • http://vedisupekak.epizy.com/49892431318.pdf
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_30c496a01116461d80a544738056e836.pdf?index=true
    • 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_off0000e0c4.bin
a95084f96f0906fd5635dcf30d3a4dcda29e4d6ee543e7fb4b53a7e67ab5d46c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 4736 bytes
font_01_sfnt_off0000f0e7.bin
b03c9ff449cd96b1ccccfa59d16f3f999113450baf90a02a9b59f01482e35c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 13708 bytes
font_02_sfnt_off00011b14.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 4324 bytes

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