Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea62157c3812b17…

MALICIOUS

PDF

93.2 KB Created: 2020-11-19 15:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5395b5aa826225045312d531ef1dcb2d SHA-1: 189a742f46bba9c188faa31f3671e93c1fa857f1 SHA-256: fea62157c3812b17be5f7357d73c7431db01881dece72db984e05fdf9efbd823
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffking.ru/strik?utm_term=isaac+clarke+armor In PDF document text
    • https://guxaniwirivud.weebly.com/uploads/1/3/4/7/134736027/7654514.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/2893402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fa6c2fc44989.pdfIn PDF document text
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/8c7d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456132/normal_5fb3e3d41fd7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb36c6eb-1785-48d7-93b1-bd174f1f45f4/letizawodeka.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/nelowugisibeb.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/triangle_windows_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/42459433976.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/dibujarte_book_2.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/rafeseradefuxebin.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/ultrasound-_guided_transversus_abdominis_plane_block_ropivacaine.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/red_moko_grass_ffxiv.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_off000132c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C8 4944 bytes
SHA-256: a77ab2f2eb1cb699f1d0a1d888d38607f59cf0b125f23ed748d81d1dc04cec56
font_01_sfnt_off00014383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14383 10748 bytes
SHA-256: 508d8b26222b188df779d1f8cc32e9ed7104508c83597c46d839eff42a0d9252

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