Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89d1c384a580537…

MALICIOUS

PDF

77.4 KB Created: 2021-04-03 21:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: de664704517db58563ce82214d9888f2 SHA-1: d25ab1407e375f319bc7e3000a4da5312b9a93bb SHA-256: a89d1c384a580537c86b3099408dbe34b4276cea4f78cd49eaf7da9e7173e7be
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/123?utm_term=2005+cadillac+sts+repair+manual PDF link annotation
    • http://arnautmebel.ru/36223026944llzcr.pdfIn PDF document text
    • http://astropsychology.site/990622179962khk2.pdfIn PDF document text
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/koxig.pdfIn PDF document text
    • http://ginajazadunoxix.22web.org/embed_report_viewer_in_asp._net.pdfIn PDF document text
    • http://kowuterada.mygamesonline.org/sialogogues_and_antisialogogues.pdfIn PDF document text
    • https://sobafezusebe.weebly.com/uploads/1/3/5/3/135335887/1231039.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/banco_popular_de_puerto_rico_en_estados_unidosfo4k5.pdfIn PDF document text
    • https://rumuxino.weebly.com/uploads/1/3/5/3/135324707/jupebanib.pdfIn PDF document text
    • http://zinuginevero.22web.org/17747091678.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/formas_de_comunicacion_interna_en_una_empresa.pdfIn PDF document text
    • https://zawanudodulir.weebly.com/uploads/1/3/1/4/131452903/f52e7a45de89671.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/b67d7eb87.pdfIn PDF document text
    • http://potolkilife.ru/411199489049z16y.pdfIn PDF document text
    • http://pexukakadom.22web.org/ferijusosatedulopiwubeki.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://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_2a8a9849bc374207b1510a0172c16f5f.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_d4ffedbb66fb47e8a263423411d080b9.pdf?index=trueIn PDF document text
    • http://zapofekeba.rf.gd/10_maths_half_yearly_answer_key_2018.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/act_practice_reading_test_with_answers.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_32c61c4c818f438d9c7fde44a91992ad.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_04cdaae8def04c45bd974ecae8ab70dd.pdf?index=trueIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_9425e665fa964bbea0921782a5988b14.pdf?index=trueIn PDF document text
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_776b2f10588b483a858bb3c1629b1dd9.pdf?index=trueIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_b1e43be02b6e41d6bb8c069a581b364b.pdf?index=trueIn PDF document text
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_1f21168d34714c54a63300b57d1d66e6.pdf?index=trueIn 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_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 5296 bytes
SHA-256: b089a944071494908bc82e84bba9e5a0edeb9c261065cf16803defc877651caa
font_01_sfnt_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 10484 bytes
SHA-256: 5e8e82c67e8240ec3e905fc870f8a69fc179d02aded0c259a201d56977d6ea0c
font_02_sfnt_off0001187d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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