Malicious PDF — malware analysis report

Static analysis result for SHA-256 f880627d7600657b…

MALICIOUS

PDF

81.0 KB Created: 2021-04-29 22:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a800c63def84d65e269696b6c9dd094c SHA-1: 288b82224c32eb21457a8af89342ef221a378774 SHA-256: f880627d7600657bcac2b445db7a1d13622f163ba79f14ed0987a1e6c82ba462
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure, suggesting a phishing or malware distribution attempt. The presence of numerous external links, including a link farm, further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=the+royal+ranger+book+1+summary
    • https://cdn-cms.f-static.net/uploads/4417426/normal_5fd2f85bd2acd.pdf
    • https://cdn-cms.f-static.net/uploads/4388157/normal_600bbfb4b8824.pdf
    • https://cdn.sqhk.co/mipijotom/jhznhjQ/voicemod_android_discord.pdf
    • https://cdn-cms.f-static.net/uploads/4391024/normal_6033a12a7f215.pdf
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/tomomomu.pdf
    • https://cdn-cms.f-static.net/uploads/4499282/normal_6022afcec9d48.pdf
    • http://zekifafeter.scienceontheweb.net/types_of_blood_groups.pdf
    • https://cdn-cms.f-static.net/uploads/4482406/normal_604fb88906d32.pdf
    • https://cdn.sqhk.co/dapumexader/I7fjaIn/chocolate_raspberry_cake_recipe_easy.pdf
    • http://kemedejovon.getenjoyment.net/borderlands_la_frontera_gloria_anzaldua.pdf
    • https://cdn.sqhk.co/rejiwosujupa/7vcOria/febowogufezigus.pdf
    • http://tokepubex.getenjoyment.net/dinefiwek.pdf
    • https://cdn.sqhk.co/ragebobeb/hdUijif/xisegi.pdf
    • https://static.s123-cdn-static.com/uploads/4393358/normal_5ff96f05140e1.pdf
    • https://cdn-cms.f-static.net/uploads/4449599/normal_5fd8f1c5da3b7.pdf
    • https://wuvenenuw.weebly.com/uploads/1/3/1/3/131383928/4278479.pdf
    • https://mipurokuniveg.weebly.com/uploads/1/3/4/5/134508865/vefoto_duneputodisutar_tunepogemu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://ridimonaf.rf.gd/fezodafadotobefafi.pdf
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdf
    • http://sajififavaw.epizy.com/aprendizajes_clave_geografa_secundaria.pdf
    • http://jadivepijuga.myartsonline.com/aocs_official_method_ce_1b_89.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_off0000f1a4.bin
5f517465535e3c2f975725274903e95659e44a14ded136a87f1718f29220f877		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 5160 bytes
font_01_sfnt_off0001030e.bin
3b0a7b2f0216a3d6eb82c43958bf168b662e8d85d5d00c95e436fc14fbc18062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 10480 bytes
font_02_sfnt_off0001270c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1270C 4324 bytes

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