Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc78e148b6e99baa…

MALICIOUS

PDF

73.7 KB Created: 2020-11-24 02:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 706a1d4051d3c34406884e78c35937da SHA-1: 8535ee0955a4a7cbf082badc95f8735eef729add SHA-256: cc78e148b6e99baa539a9dbb7cbfc8830e7e50f3649f949f55a3fe0d553a647f
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains multiple heuristics indicating malicious redirection and a link farm, specifically pointing to a redirector URL that is part of a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to 'mods' and 'wkhtmltopdf', suggesting a lure for game-related content to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?utm_term=the+bureau+xcom+declassified+mods In PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/745209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_5fad41a760d8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_5f94334a16504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_5fadc7f4d5283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_5fb41e78222ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_5fa8194009738.pdfIn PDF document text
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/mupaso.pdfIn PDF document text
    • https://xojoguxivizu.weebly.com/uploads/1/3/4/0/134096407/95fd165fb1b.pdfIn PDF document text
    • https://judemozosuduj.weebly.com/uploads/1/3/4/3/134306717/fca0465.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/7768da56-63fc-42a4-bd88-f51e094342f7/gmc_repair_manual_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f517b8da-4a7c-404c-9248-04634e75e04d/coc_base_building_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffe0685-7a35-4bac-a438-a387b03bee9f/putlocker_avenger_end_game_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0937e2e-2709-4fca-8d92-8a0cd442b318/65158676981.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
    • 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_off0000ccf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF8 5416 bytes
SHA-256: 585dadef46f65ffa1f60bd51e4802880d72db89cdc7bb25b82d715f4a64af044
font_01_sfnt_off0000df37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF37 10720 bytes
SHA-256: 7c4c9db429275ac919c13cc011108c339e6d84c9a7cb7f491cca1b368bc86237
font_02_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 16332 bytes
SHA-256: 91c92fab729f552433758475f1ecf6a366c66c74ae6b4dd9e31a9a0100f2b42c