Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b04d292ef50a91…

MALICIOUS

PDF

76.6 KB Created: 2021-03-20 01:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bf1e1ed00abae88acace934f90ef57d SHA-1: d2ba208ff0c8edb32a78d7823b81ab763dbd859c SHA-256: 70b04d292ef50a913764730629900d647f97917cad7b09de37954ce202e5fb27
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO abuse tactic. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support malicious intent. While no scripts were directly extracted, the presence of numerous URLs indicates an attempt to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=concept+10+air+conditioner+age
    • http://golipodib.22web.org/xavanasowokuratov.pdf
    • http://towufato.mywebcommunity.org/laferavudokanejuborotuj.pdf
    • http://itsamorem.com/keiichi_okabe_nierautomata_original_soundtrackdjmh9.pdf
    • http://pefiworawodud.mypressonline.com/moxavomiwanak.pdf
    • https://kevesotajomuvow.weebly.com/uploads/1/3/5/9/135959451/pewejozanirumap_vasufoviso.pdf
    • https://kuxorife.weebly.com/uploads/1/3/5/3/135313812/budepomanu.pdf
    • http://reestr.site/fonasenasozipuvajep8z27.pdf
    • https://nuvefozilif.weebly.com/uploads/1/3/4/7/134733792/tivefivowaxot-bifozege.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_fece6de940764fee8a8b19db95a8cd2b.pdf?index=true
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_33ea5b62309f48f29b22d03f48f10345.pdf?index=true
    • https://s3.amazonaws.com/xidulumexi/gerejavajajomikogobirizat.pdf
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_9a35b173434d41e2b8411fee3258e887.pdf?index=true
    • https://s3.amazonaws.com/perurulexi/81034316728.pdf
    • https://s3.amazonaws.com/zowejunef/67357385166.pdf
    • http://kemufare.epizy.com/96352610677.pdf
    • http://likutolejit.onlinewebshop.net/construct_2_free_license_key.pdf
    • http://desujolu.epizy.com/astm_b117_97.pdf
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_99eb5ce632524f79872da85980d9d1a3.pdf?index=true
    • http://xutevifiwopad.rf.gd/how_do_i_stop_software_updates_on_my_samsung_galaxy_s8.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7c.bin
6c7c9812efe6dbc58a2b3e86fc791316b8c4d2cada5b958e755844d46143cef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 5128 bytes
font_01_sfnt_off0000ff01.bin
71dea8aecb37956a8f15638ba5673f41aa58cf90a28cbd4a5d47779efa545054		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 10792 bytes

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