Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a2b5cd5b6921d8…

MALICIOUS

PDF

72.6 KB Created: 2021-05-15 18:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ae0aade0d4a9acb2144b84b2a5192f30 SHA-1: 4ea12b8375a0854d3aab992629f25b5592c5a167 SHA-256: 79a2b5cd5b6921d8d6fe40d1b63e8e77d341cb863064c77ab2ff5a4c9eb402ca
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary URL, https://mezovuduw.ru/strik, is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/strik?utm_term=uppababy+vista+stroller+travel+bag PDF link annotation
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/7e6673590.pdfIn PDF document text
    • http://rezolurumo.iblogger.org/27687847834.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/2nd_edition_dd_books.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/xogivajidazediwimuraza.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/5178546509.pdfIn PDF document text
    • https://vefubonipit.weebly.com/uploads/1/3/4/7/134719522/migixojivapam-naremegugiz-bupodax-xivanifavekopik.pdfIn PDF document text
    • http://zukoxofiro.22web.org/vitamin_b12_sources.pdfIn PDF document text
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/94c2ccea4.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/1b189e514c4bfc.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/balibuluxetapipadel.pdfIn PDF document text
    • http://kizisuruz.22web.org/sword_art_online_fatal_bullet_review_ign.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/novejapotobebipufu.pdfIn PDF document text
    • http://zabekoreju.iblogger.org/45009685669.pdfIn PDF document text
    • https://kitozegukelod.weebly.com/uploads/1/3/6/0/136056839/savuwu-fepefuwu-kenesozi-vimipizemafatej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_d80055ce56254f8fa99e6374d50a69ee.pdf?index=trueIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_ac132c62f5ff40888e5d1f5d5b0c8f8e.pdf?index=trueIn PDF document text
    • http://defixudopa.rf.gd/soda_6_crack_free_download.pdfIn PDF document text
    • http://posikin.myartsonline.com/side_effect_of_aspirin.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_4bb852c07f6e43088f9d94d5bb275ce0.pdf?index=trueIn PDF document text
    • https://b9ecad59-ee1c-469f-8402-ddbad3bf215f.filesusr.com/ugd/84dab8_f2377f87c7664bc69a6527fa0cd96a22.pdf?index=trueIn PDF document text
    • http://pumamolo.rf.gd/fozexopufaxexovox.pdfIn PDF document text
    • http://davutawopoban.epizy.com/30022948430.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_2b54936f5a73470fa8cfefcc295f3afc.pdf?index=trueIn PDF document text
    • http://pajisusag.epizy.com/silabus_biologi_sma_kelas_11_kurikulum_2020.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_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 5280 bytes
SHA-256: 83685ce6d32860bdb3d67bc10739d6e0d639af2e443634940c287796c8e44f6b
font_01_sfnt_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 10600 bytes
SHA-256: bc959cbe7ece9b525c66b9407e70aef906f0752a99b4610b439faf5569f89d0f

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