Malicious PDF — malware analysis report

Static analysis result for SHA-256 42905dc076195474…

MALICIOUS

PDF

75.7 KB Created: 2021-04-06 14:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 72794b4db8b8182cb555b7fb3d05f60e SHA-1: 2f84b827bb28c3dbded755b39851370d3569f4ed SHA-256: 42905dc076195474d2605503c25d1d9a4e282290dfe487a9ea674ef300129547
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests an academic context, which is a common lure for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://lozipotod.ru/award?keyword=bsc+zoology+notes+first+year+pdf PDF link annotation
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/takewuw_rapopilos.pdfIn PDF document text
    • http://laitlabs.pro/adobe_premiere_rush_green_screen2l7p8.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/sojuxezigijupawarativi.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/kesedomigusobodo.pdfIn PDF document text
    • https://pusotovoxidelo.weebly.com/uploads/1/3/1/6/131637553/54840.pdfIn PDF document text
    • http://twitter-center.com/how_to_do_a_job_interview_with_anxietyvb1dy.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/42682390121.pdfIn PDF document text
    • https://dilukali.weebly.com/uploads/1/3/4/5/134584555/wuwulifuve.pdfIn PDF document text
    • http://losqutoq.online/what_about_federalist_70_concerned_the_strict_constructionistsuvizj.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/bwv_147_organ.pdfIn PDF document text
    • https://fonuwinozizanam.weebly.com/uploads/1/3/1/4/131408397/3724063.pdfIn PDF document text
    • http://devigebogubiret.getenjoyment.net/ielts_speaking_part_1_tips.pdfIn PDF document text
    • http://jezonikiroka.mygamesonline.org/amandemen_uud_1945_terbaru.pdfIn PDF document text
    • http://tradestaroffice.com/hubli_weather_report_livekm8bx.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/8516601552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5729bf4d-af12-4774-a544-0585b8892df3/woletojudi.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/deus_ex_mankind_divided_best_ending_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bcf88f0-2983-431a-b2be-add257c54dc7/lobopumibir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ddfcd3-453a-4f34-8147-8715a510a1b4/sloan_flushmate_wont_stop_running.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/pozox.pdfIn PDF document text
    • http://kabuzore.atwebpages.com/zizaxexanugal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72c3632-ef6f-4b15-af58-edbb80121a9d/1_de_novembro_feriado_em_que_paises.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_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5524 bytes
SHA-256: dd4d67907c028263ee140002aeab9a7cf90558dafbf667ca9131bbf64472be00
font_01_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 11128 bytes
SHA-256: c9b17d5541c16c3c6a4b8b8dfab8bc383b242475fc2112fd1531fb185078c049

Open this report in the interactive analyzer, or submit your own file for analysis.