Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce59b0c51fca70ef…

MALICIOUS

PDF

125.9 KB Created: 2021-04-07 22:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 503d694633f41ec69eb583fe37157062 SHA-1: c2ea17ac2c54b8ae0503d696492f7d6d682390ae SHA-256: ce59b0c51fca70efb031085ecf7a0c2079f925c3c50a2129e553e757b5b47051
292 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded URLs, many of which point to known malicious redirectors or disposable hosting, suggesting a link farm designed for phishing or malware distribution. The document also includes a lure related to clipboard commands, instructing users to copy and paste content, which is a common tactic to bypass security measures and execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://crophysi.ru/strik?utm_term=hypercom+t7+plus+password In PDF document text
    • http://flash-sar.online/kerala_lottery_winning_methodl0kr1.pdfIn PDF document text
    • http://ijmalan.xyz/pablo_neruda_poetry_poem_summaryg9tj5.pdfIn PDF document text
    • https://cdn.sqhk.co/wanolugago/WIjcjbx/rufubikoje.pdfIn PDF document text
    • http://lnstagram-helping.live/aspose_extract_text_from_cuqyus.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/hhietic/mipirerunafilexen.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/rwJGVih/zafejijinemuluwozewarexu.pdfIn PDF document text
    • http://dronextactical.xyz/monster_labs_review_2019nzm7u.pdfIn PDF document text
    • http://blog-millionaire.buzz/fumekagumopizedogujepo6n9jd.pdfIn PDF document text
    • http://letnesil.xyz/36946693860qn8dg.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/jgdWHlo/gepelubibegogajerixogugen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_a840874171914324901c94eb8d390fbc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85087e82-cc0e-445f-b5a0-d9289e234696/79050322107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c879e643-0232-48cc-9cbb-59cee0b72439/22245395796.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_9eb7be94536f4a12a92b71ff24a218c9.pdf?index=trueIn PDF document text
    • https://041c2bdd-267b-4995-9d72-d071cf2c2b2b.filesusr.com/ugd/ba0b69_1e4a87f0ed144ec8a5d30e2e61d57852.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_1243454c41654a9da71a88b6886c025c.pdf?index=trueIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_39ce11a959f74a97a68f7207471fdc15.pdf?index=trueIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_2cda60f17a3f447b9236e42789b941b7.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_168b9f766488436098d9681cac3e4cf1.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_b7c1434a8b9644618705e30a4c1aa315.pdf?index=trueIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_740e8562d3a54d07a0c218ed9b7f86a4.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A56 5452 bytes
SHA-256: 6860265a4dfeb28f42c990bc21250fbdd92f3ce2fe2446b501936e8315cc55df
font_01_sfnt_off0001ace7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACE7 11624 bytes
SHA-256: 5b5e3d4064589272c924ec9447b4be204bdb8a647d053d5c44dd247886ec48f4
font_02_sfnt_off0001d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D489 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174