Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b785ca622b07c4d…

MALICIOUS

PDF

75.0 KB Created: 2021-01-17 17:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2e19d433e9e02d40887e5c3bb17d74fc SHA-1: c8810549dea72fcee74c23758adcd16bb3c672f8 SHA-256: 7b785ca622b07c4ddfa6491f1d6dfae7f9d6319fb95d4c2a0ff8297eebf0c5a8
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though corrupted, contains keywords related to cheats and software, suggesting a lure to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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://cctraff.ru/123?utm_term=looney+tunes+world+of+mayhem+cheats+deutsch In PDF document text
    • https://cdn.sqhk.co/sevafeluba/fujwDgf/wedding_cake_toppers_custom_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/licq4hf/67890319569.pdfIn PDF document text
    • https://pimabebobi.weebly.com/uploads/1/3/2/3/132303226/peres.pdfIn PDF document text
    • https://site-1177041.mozfiles.com/files/1177041/fgteev_soundboard_ios.pdfIn PDF document text
    • https://zufopawel.weebly.com/uploads/1/3/4/4/134462865/e928d797852ff.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/aHUVjcZ/ultimate_motorcycle_simulator_mod_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/qrijHLB/allegiant_book_flight.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://borinalujid.epizy.com/45663068708.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_off0000e814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE814 5396 bytes
SHA-256: 477a2907bbd4ad865a10a395e8c5ca488292caab42a0990035072bb093b11a29
font_01_sfnt_off0000fa5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 10956 bytes
SHA-256: 9e8e47131ab367d792a777fa2319a51eabb0f18059be01fa5c4638cb5e288d31

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