Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83722295aa6bb83…

MALICIOUS

PDF

76.9 KB Created: 2020-12-26 00:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4ba2585e2d0c97e606b284cbc354446b SHA-1: 92ae467e033b3576c4d71d95a68e0a006a423b84 SHA-256: f83722295aa6bb83e5b64df30d01dbe9f360a5f6e4902bbc37d4e8c651a45464
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous Weebly and sqhk.co links suggests a link farm or phishing campaign designed to redirect users to potentially harmful content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=incense+colour+change+pokemon+go In PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/wirokuwofubonoderax.pdfIn PDF document text
    • https://temoxemotedi.weebly.com/uploads/1/3/4/5/134599163/xolus_goluranowi.pdfIn PDF document text
    • https://cdn.sqhk.co/pakuvesajuwo/6Jgcjf3/67299965454.pdfIn PDF document text
    • https://wimavikuwoj.weebly.com/uploads/1/3/4/6/134698125/wototefumaf.pdfIn PDF document text
    • https://jamexujibelesuw.weebly.com/uploads/1/3/4/7/134748805/d477f4b9ad.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/90492ae4732.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/2822748.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/jiff5hb/bus_driving_simulator_games_free_download_for_pc.pdfIn PDF document text
    • https://fegexogemitise.weebly.com/uploads/1/3/4/6/134602812/vidopotexuxus_wuluvununexif_regafitelem_rodonosagazu.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/SLHq87f/xezudoxojub.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/zuponefi/bodutijotatuzetevopo.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/86897137124.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/18778460144.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/pathfinder_template_giant.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_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 5348 bytes
SHA-256: bcee7dd97d35644a667bbcb91b250f3fe40b497d6d7315babedccefbeed6d7b1
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 10536 bytes
SHA-256: 523abb556fb63cfd43d8e76961e93c6f61e30070f5e96b461388a757df88bb25

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