Malicious PDF — malware analysis report

Static analysis result for SHA-256 2124ea204b3d37dc…

MALICIOUS

PDF

70.1 KB Created: 2021-01-28 07:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c58edd0a2aa37a0127df619dbaf30de1 SHA-1: b872c1ba0689e11dc158c6af61aac5e477646f39 SHA-256: 2124ea204b3d37dcdd31335eb734509457c74b7a1e9f4d75b30808dd3335acbd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL related to cancelling PayPal payments. This strongly suggests a phishing or scam attempt designed to trick users into visiting malicious sites. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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/123?utm_term=how+to+cancel+payment+on+paypal+mobile PDF link annotation
    • https://cdn.sqhk.co/dedenijikal/ihhjmim/liar_s_dice_board_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/sHgcR0I/xowuwito.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/cHW2igJ/bodebimipavepebamemivef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5fe97296679f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422133/normal_5fcdfe81aad77.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/jf3hcne/outbreak_dread_the_undead_myrtle_beach.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381973/normal_5ffbb53ea3009.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/dulirogafomabab-woxuwuruxupu-godubuwuxutufus.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/iijQhgu/87701628509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500877/normal_5fc8f16f72345.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/wupiwupiwot/ambuli_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/intellij_format_code_eslint.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_off0000d432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD432 5100 bytes
SHA-256: 79726c10e163cfe8ba8dc4927c68000fe813e6bc4e8a6c46b814a475238a990d
font_01_sfnt_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 11112 bytes
SHA-256: f3c919a33504542d6469e877f1c21d29bd256da955abe419b9866b25cfc4d18b

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