Malicious PDF — malware analysis report

Static analysis result for SHA-256 486923e4f1f54841…

MALICIOUS

PDF

87.3 KB Created: 2021-02-24 12:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cd5f6ba16892ebc083560a068e44bff4 SHA-1: b0d5c79a66d2a9b3d48bca78f4a6598d6cc81b45 SHA-256: 486923e4f1f54841e4981e5af5ec4c0a78caaa004d2eee9fda09b05a5be3e48f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links pointing to disposable hosting services, suggesting a link farm designed to obscure the ultimate destination or host malicious content. The presence of embedded URLs and the structure of the PDF strongly indicate its use as a lure to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://bologen.ru/123?utm_term=authenticity+duty+and+empathy+in+do+androids+dream+of+electric+sheep PDF link annotation
    • https://cdn.sqhk.co/kusedesomawa/iieI2hh/4474008291.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/kizuv_rejemifubudani.pdfIn PDF document text
    • https://majivuwuwu.weebly.com/uploads/1/3/2/6/132683475/fubanowiwotefo.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/132ce5.pdfIn PDF document text
    • https://toposizijud.weebly.com/uploads/1/3/0/7/130776562/6216053.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/heoHPhb/agar._io_bots_server.pdfIn PDF document text
    • https://neboxikadifi.weebly.com/uploads/1/3/4/5/134588308/5981354.pdfIn PDF document text
    • https://bobixazila.weebly.com/uploads/1/3/4/5/134599816/4f513f497d.pdfIn PDF document text
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/momipanipi-bovefip.pdfIn PDF document text
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/402a5cc79f60936.pdfIn PDF document text
    • https://vipigenomunopem.weebly.com/uploads/1/3/1/3/131398348/kituwobum.pdfIn PDF document text
    • https://gununoneku.weebly.com/uploads/1/3/4/3/134309052/4071789.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/3127199.pdfIn PDF document text
    • https://xisidugaboker.weebly.com/uploads/1/3/4/4/134436298/fb92ca972745f7c.pdfIn PDF document text
    • https://suripukizoj.weebly.com/uploads/1/3/6/0/136089511/sumewosalusi_xejisugebalu_jideragabo_wizatemupinavoz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/heMidRa/instatistic_followers_tracker_for_instagram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juvegebufu.epizy.com/rise_of_nations_android_game.pdfIn PDF document text
    • http://julajibumomas.rf.gd/add_fractions_questions_and_answers.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 5484 bytes
SHA-256: cc99ab19591ee6db3c3f85629f75c09106f225846a8f4aa98457c65b9bf32dc9
font_01_sfnt_off00012996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12996 10948 bytes
SHA-256: 789619a601772084635716f1f6d9af014403026006db20bd0289cd92868052ab

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