Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e65a3c0d2b3a14…

MALICIOUS

PDF

83.4 KB Created: 2021-03-14 02:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 671e320f82f27758aa83e4a79a06fb28 SHA-1: 7c81e7661feb6b6214f23e5acba7e1d3e4a5cd5b SHA-256: 86e65a3c0d2b3a1467c747cee42b7b5be8b20b2a91c624e16470c4a961931e5b
156 Risk Score

Malware Insights

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

The PDF file contains multiple external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to 'http://mmmmmme.space/panchatantra_odia_storyqx4an.pdf'. Another heuristic flags an external URI to 'https://ponafet.ru/strik?utm_term=how+to+reset+my+onn+bluetooth+headphones'. The document body, though heavily obfuscated, suggests a lure related to 'how to reset my onn bluetooth headphones'. ClamAV also detected this as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=how+to+reset+my+onn+bluetooth+headphones PDF link annotation
    • http://mmmmmme.space/panchatantra_odia_storyqx4an.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5ffcdeca4ca01.pdfIn PDF document text
    • http://giftcard-sale.store/how_to_write_videography_business_plan_for_restaurantk12wl.pdfIn PDF document text
    • https://jifibixivedud.weebly.com/uploads/1/3/6/0/136082986/67ec8ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_60146e2eed8cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_6006e5037c8fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375699/normal_5fec5491d76e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_6004a41693783.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/tone_of_poems.pdfIn PDF document text
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/wunawa-fapukuxa-kunuloputemiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_5feaf28d17e07.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/mevojewinuwuxogu.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/28777590749.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xurolawewetaw.epizy.com/22329957872.pdfIn PDF document text
    • http://fadojogepu.epizy.com/samsung_rsg257aars_owners_manual.pdfIn PDF document text
    • http://vibirokudod.myartsonline.com/26632913120.pdfIn PDF document text
    • http://bixodog.rf.gd/40106963851.pdfIn PDF document text
    • http://watenumedar.rf.gd/98772125536.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_off00010884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 5492 bytes
SHA-256: a9ce2faa58ca13d153626ab61ecace72631d223789a43bd863647384962d4ff6
font_01_sfnt_off00011b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0E 11000 bytes
SHA-256: b3c9e1f6cce876668b59c6f21f879cf75f8acae7e30d4769d62f086f23cbaf3a

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