Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7a6fa8a2caf4a2…

MALICIOUS

PDF

70.5 KB Created: 2020-11-14 20:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 062f5bb51ba6c6910fb427e49aab5f45 SHA-1: 770cf3f5b18bd4405824a6a2b6f75b0b10d0ffd9 SHA-256: 9c7a6fa8a2caf4a25ec1d45ce2b3fd72bc317fc39858af3a5aa545272a285f78
214 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one identified as a known malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojan-like behavior. The embedded links suggest an attempt to direct users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=chancho+de+monte+crucigrama
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f8a24748ed14.pdf
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5f9813994a293.pdf
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5fa0e6d140729.pdf
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f8fd1e2892fe.pdf
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/bopajuporagixinufu.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8e1db3d1656.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/muxozuvalubi/invitation_card_template_design.pdf
    • https://s3.amazonaws.com/baxunaf/beast_tv_iptv_reviews.pdf
    • https://s3.amazonaws.com/pidufozu/76086857836.pdf
    • https://uploads.strikinglycdn.com/files/2d3d51dd-7ceb-4bf7-b526-9d9ec7db734b/define_formal_operational_stage_in_psychology.pdf
    • https://s3.amazonaws.com/mubemutolewe/the_gazette_of_india_extraordinary.pdf
    • https://s3.amazonaws.com/naxizugenabi/do_money_spells_really_work.pdf
    • https://uploads.strikinglycdn.com/files/ae751bb1-415a-487d-9c7a-847da382fc6a/tomokuliwebij.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4fe.bin
2f62cc973235f2698cc57158580e4c20173c84cf5569eef75bc27a3edb813590		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FE 5048 bytes
font_01_sfnt_off0000c5f6.bin
34b3a29822b77ce05cce8b541ccb9db484b7969d7285019ea9a0d6bc01d9e9da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F6 10736 bytes
font_02_sfnt_off0000e9e4.bin
45cbdee8d0e9683c34ea7758bf990cbd3650d80547672a96691f419f916de5fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E4 16164 bytes
font_03_sfnt_off0000fefb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFB 4324 bytes

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