Malicious PDF — malware analysis report

Static analysis result for SHA-256 51980c400138622a…

MALICIOUS

PDF

82.9 KB Created: 2021-05-01 19:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f201ad366b253078adae1f3c3d3ddc91 SHA-1: d47e1789da0654a517755ec2179ac14dd99b7b66 SHA-256: 51980c400138622a94a35d5c25ef2c27e30ebd6c64e5fec87e84ac217779f3a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent link, disguised as a sports stream, points to 'https://zajinet.ru/strik'. The presence of multiple PDF links and the ML classifier flagging it as malicious suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=maple+leafs+vs+blue+jackets+game+5+live+stream PDF link annotation
    • http://nuzopofe.iblogger.org/driverless_cars_technology.pdfIn PDF document text
    • https://tonobidev.weebly.com/uploads/1/3/5/3/135326126/gekemutepu.pdfIn PDF document text
    • http://xapozibun.22web.org/32901220869.pdfIn PDF document text
    • https://xaviguvugunaji.weebly.com/uploads/1/3/5/3/135313722/bugaped_somomo_podawanorabup.pdfIn PDF document text
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/ccc06.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/g7tjfii/womens_superhero_compression_shirts_uk.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/gegitejuvunidom.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/kgeicjf/top_up_genshin_impact_cheap.pdfIn PDF document text
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/498d357e.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/hdQDtjg/grade_9_mathematics_questions_and_answers_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fejakixoweka/64718683926.pdfIn PDF document text
    • http://lowoxewepabetex.rf.gd/27894856484.pdfIn PDF document text
    • http://lizolubemerawi.epizy.com/bilal_saeed_bewafa_song_pagalworld.pdfIn PDF document text
    • http://nilikejavovop.rf.gd/femawowemebal.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/49277677292.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/nefef.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/breville_bbm400_gourmet_baker_bread_maker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/can_police_use_snapchat_as_evidence.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/38216085291.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/vurupese.pdfIn PDF document text
    • http://gujodelabugujaf.rf.gd/act_reading_practice_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/93743488983.pdfIn PDF document text
    • http://wokitamij.rf.gd/sleep_number_lyocell_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/defiant_castle_keypad_deadbolt_manual.pdfIn PDF document text
    • http://xesoxudonututad.rf.gd/bryant_evolution_furnace_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/words_that_start_with_k_for_kindergarten.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 5468 bytes
SHA-256: 2a81b30e226a9a8d0ddf23c626382a4e962ec36c4a865147b9e6e9b7e6950e2f
font_01_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 10988 bytes
SHA-256: e3078d4033689d50c4733290d5a4af9ca0a71374d48059856ef1bc20c4a9e381
font_02_sfnt_off00012dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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