Malicious PDF — malware analysis report

Static analysis result for SHA-256 8689c19a13ba0a71…

MALICIOUS

PDF

112.1 KB Created: 2021-01-11 18:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3be17db84aca6d51e481755d71b35d2e SHA-1: aa253657e240df6e31d38f268dabfebce8949a61 SHA-256: 8689c19a13ba0a7107b7475fdf1ad119bc875d351f7f59b109a10e5e4df65c8f
212 Risk Score

Malware Insights

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

The file is a PDF that contains heuristics indicating it is a payment redirection lure and a link farm. The embedded URL 'https://trafffe.ru/aws?utm_term=debtors+reconciliation+statement+template' is suspicious and likely leads to a malicious site. The PDF also contains a large number of external links, many of which point to S3 buckets, suggesting an attempt to obscure the true destination or host a large number of lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=debtors+reconciliation+statement+template PDF link annotation
    • https://cdn.sqhk.co/perajomipe/Z3jgCJN/82863348551.pdfIn PDF document text
    • https://site-1176699.mozfiles.com/files/1176699/96495114457.pdfIn PDF document text
    • https://site-1177644.mozfiles.com/files/1177644/83223732334.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/sulogore.pdfIn PDF document text
    • https://site-1179767.mozfiles.com/files/1179767/idle_zombies_mod_apk_1__1__9_download.pdfIn PDF document text
    • https://site-1176079.mozfiles.com/files/1176079/download_hit_knife_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/dhcfDgi/alone_movie_tyler_posey_netflix.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/vinivuxo/92315400502.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/sijejalojetibixavetag.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/good_reader_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/chivalry_is_dead_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/8208264450.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/11570115640.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_off00017b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B12 5220 bytes
SHA-256: 1c067802c8e6730a18f7a81abf10c4e33e864a4721c9ed369f2146d0682f3b38
font_01_sfnt_off00018cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CBD 11200 bytes
SHA-256: b2d3af96a515ec4a102a942dbe5481b5efa2000587634c210caa83c1a32137ab

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