Malicious PDF — malware analysis report

Static analysis result for SHA-256 029ac2c594f08d9f…

MALICIOUS

PDF

77.4 KB Created: 2021-03-17 19:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18aa3dcb93d0a1aa9abec3cfea2c5c01 SHA-1: d5c05de66aee1be1bc34748322eb1257f21e6881 SHA-256: 029ac2c594f08d9fbcc810e1409ca191cb1c3672cb6186694aaaa81873e3d8fe
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, suggesting a link farm or phishing campaign. The 'SE_CALLBACK_LURE' heuristic indicates a potential for callback phishing or tech-support scams. While no scripts were directly extracted, the PDF structure and embedded URIs strongly suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pelibifir.ru/wix?keyword=dream+serenity+mattress+topper+4+inch
    • https://zamikife.weebly.com/uploads/1/3/1/6/131606416/2c99d.pdf
    • https://cdn.sqhk.co/junigofulum/ejjhasV/hide_n_seek_bakersfield.pdf
    • http://ganedoxumizaj.sportsontheweb.net/1488034342.pdf
    • https://vidulegu.weebly.com/uploads/1/3/4/8/134897898/napujibin-tedeguwejemiwuw-vepefa.pdf
    • http://melidagerukebel.sportsontheweb.net/morrisons_cafe_menu.pdf
    • http://xejopegig.mypressonline.com/rekomor.pdf
    • http://zumewidife.mygamesonline.org/69693220084.pdf
    • http://solusaxisabo.scienceontheweb.net/how_much_developer_to_mix_with_igora_hair_color_10.pdf
    • http://xijulefabogi.getenjoyment.net/jefegebajukifilij.pdf
    • http://zesegalos.scienceontheweb.net/43836182945.pdf
    • https://cdn.sqhk.co/tajugajobib/jicNJhj/irish_treasure_rainbow_bingo_free_online.pdf
    • https://dineretisa.weebly.com/uploads/1/3/4/7/134709889/aca960.pdf
    • https://cdn.sqhk.co/xaxamipuxum/haDv3jc/apple_smart_charger_iphone_x.pdf
    • https://cdn.sqhk.co/wazikunal/9gdhdji/jeralozub.pdf
    • https://widedajixefur.weebly.com/uploads/1/3/5/3/135312737/zunipewan-zasinojuse-ximeda-lomovinu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xuvamuba/pupozitozus.pdf
    • http://pevipitoz.atwebpages.com/acute_fluoride_toxicity.pdf
    • https://s3.amazonaws.com/wewiro/21535032929.pdf
    • https://s3.amazonaws.com/pasawexawinogad/unit_beruniform_karangan.pdf
    • https://s3.amazonaws.com/nilititonawafim/43255120641.pdf
    • https://s3.amazonaws.com/nitajosasa/benavenikib.pdf
    • https://s3.amazonaws.com/sinadi/71287487107.pdf
    • https://s3.amazonaws.com/fupanabivote/woxadefufo.pdf
    • https://s3.amazonaws.com/gapuruxumeg/melonodaxigeze.pdf
    • https://s3.amazonaws.com/loranoduzuja/bang_bang_full_song_pagalworld.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcd.bin
88ed9f9684d78e4510f4640b9d313785d44228b1bcf762d477eb747234a8020e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 5328 bytes
font_01_sfnt_off0000ffd5.bin
06566ce96584479e011fc2a54fe3749cc14b8f15da0f5c3323578e371dc1e606		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 12000 bytes

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