Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94c3171ecdab379…

MALICIOUS

PDF

118.7 KB Created: 2021-03-24 20:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7d93272b941cbe8ca037134ab82fa7c0 SHA-1: d46c0ba71879bf20301409de9f49a7beaf0504dd SHA-256: e94c3171ecdab3794dfd8085c8a0e9e6f8f8335dfabdf94439ca2744ceb5c5b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute further malicious content or conduct phishing. The presence of a 'download button' lure reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=myanmar+font+for+ios+12 PDF link annotation
    • http://terem.space/47147759445i43qh.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/aadhar_card_status_app.pdfIn PDF document text
    • http://olymptrade.buzz/kerala_melam_mp3e4pzq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5ffc02bb46aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_6044cb76c574f.pdfIn PDF document text
    • http://fotobaruti.22web.org/letaputotoketozevi.pdfIn PDF document text
    • http://alexandreablog.com/god_i_look_to_you_bethel_chordsm4n38.pdfIn PDF document text
    • http://mebelintera.ru/sun_tzu_art_of_war_booktkjv0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_d4b2854d26e045aa93f1be23e648886f.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_82ab32fd833640c1a5309b6caf19f885.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mulerux/muzagalimatukulu.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_95d8d8e010a34a3cb2d84de1874d3d24.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_9c96f745ef864350aa25bc73158bb052.pdf?index=trueIn PDF document text
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_9258e7e39552490c8edf50c24df5087d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/40151727713.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_9ca8b1e028ea40f2a3dba151899633f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixatax/vuvugav.pdfIn PDF document text
    • http://vunodakurawofo.rf.gd/schwinn_230_vs_270.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_43057a933c20432cb2b07ed650aae1a4.pdf?index=trueIn 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
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15106 4440 bytes
SHA-256: cb41c4bc75649f894ca3a4d9d1ba55304a63b8c90825debba3f0c2ed3cddeb33
font_01_sfnt_off000160b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B0 5172 bytes
SHA-256: 9cc750b04b4eb98f12486847313d7269fcc491feccd42dc6fa58a6c8162f5065
font_02_sfnt_off00017248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17248 5248 bytes
SHA-256: 120fbb276616a27c529c01c5e33d05e1af1e41a964b4dca1f6fe51d68c40d645
font_03_sfnt_off000180ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180BA 11468 bytes
SHA-256: 6bb34d8bfde1589f6add2eb74d147c5b7d3ad8283a910b3b32350b8eb864e8b2
font_04_sfnt_off0001a814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A814 12024 bytes
SHA-256: 5f6b357d4928843c39713f8b04314544255bdec9af4b1cb40f876f36c0ce6a21

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