Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcfbe56aa60c122…

MALICIOUS

PDF

65.5 KB Created: 2021-02-22 17:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6dfda4da11452def1ae34f774052c541 SHA-1: 3004d2b226e381dab4783d817cfc78c431029d44 SHA-256: 9dcfbe56aa60c12276495eb19f05aef80d3d9663ccda88b497effc9895e28d29
156 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including PDF_SEO_LINK_FARM and CLAMAV_DETECTION flagging it as phishing or a trojan. The embedded URL points to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, contains a lure related to a sale item, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=big+blue+party+speaker+for+sale PDF link annotation
    • http://stav-games.ru/internet_cafe_simulator_apk_indirsdl56.pdfIn PDF document text
    • http://vogeposekuxav.66ghz.com/bizolugalajabivawimit.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/dhgb2zd/neighborhood_jam_tulsa_gluten_free.pdfIn PDF document text
    • http://lenudes.com/nexuzezomosajulubupagekole8l9.pdfIn PDF document text
    • https://cdn.sqhk.co/lasanamemego/hjiiLCw/bodufetex.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/M5hfehc/snap_card_game_video.pdfIn PDF document text
    • http://detonic-official.website/533585292596djnr.pdfIn PDF document text
    • https://cdn.sqhk.co/bizufunido/Cgdjc2E/pafujowusaporowikek.pdfIn PDF document text
    • http://fbcopyright-center.com/69911098765hof4f.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/nuwufugolawosa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/newuserasowirilurodasog.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/gebovoge.pdfIn PDF document text
    • http://wajabopekat.epizy.com/recurring_decimals_worksheet_gcse_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/tuvebebevagebiwalazimonif.pdfIn PDF document text
    • http://jopimuriwunewok.epizy.com/two_cultures_c_p_snow.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/doctor_who_tv_guide.pdfIn PDF document text
    • http://meganisaniwo.rf.gd/daytona_beach_surf_report.pdfIn PDF document text
    • http://tobewopuma.rf.gd/fnaf_2_toy_animatronics.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/dusonixetosezunamiwamam.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_off0000c3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 5424 bytes
SHA-256: bac384ec0df4f4d6d88889fff0350e7de1bf61fb2cf1435f686b19319418cdc8
font_01_sfnt_off0000d677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD677 10104 bytes
SHA-256: 065c02dbfc73892ac1640b60c95bd69ce06f4e9373b02a312e2c661e7576dbbb

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