Malicious PDF — malware analysis report

Static analysis result for SHA-256 db52bfd23b0b2f8f…

MALICIOUS

PDF

76.0 KB Created: 2020-12-26 16:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28c293df73308e52fa5b03d9e7e9a896 SHA-1: 7beaa7cdee97244a3753e34668a88578e52c7e09 SHA-256: db52bfd23b0b2f8f2af2f5dce99ee2761deff3ec745ceb877da416c1582a03ab
156 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 heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The embedded URL 'https://trafficel.ru/123?utm_term=ryobi+battery+charger+flashing+red+and+green' suggests a lure related to product support or troubleshooting, common in phishing campaigns. While no scripts were explicitly extracted, the presence of numerous external links and the ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://trafficel.ru/123?utm_term=ryobi+battery+charger+flashing+red+and+green
    • https://lapenemelibi.weebly.com/uploads/1/3/4/7/134708636/babofatefo-dezilugur-tesidapegemetu-tozagopudumiko.pdf
    • https://cdn.sqhk.co/wewuxujudu/de2Reif/puma_golf_micro_disc_cap.pdf
    • https://cdn.sqhk.co/nerutamar/dumjii9/snake_puzzle_instructions_ball.pdf
    • https://pinonomobeberex.weebly.com/uploads/1/3/4/3/134318871/f1321a66ac881.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/23dee5e4-e979-44cc-b439-3b90a510e9c2/kikologuba.pdf
    • https://uploads.strikinglycdn.com/files/bd94bb9b-15bc-4ef8-b47c-6874cc87f378/facial_diagnosis_of_cell_salt_deficiency.pdf
    • https://uploads.strikinglycdn.com/files/cba786dd-cb0a-47da-8d21-5afecc9d9a32/xbox_one_hitman_games_in_order.pdf
    • https://uploads.strikinglycdn.com/files/3b44f0d7-150a-4973-9809-76b28f8f6fe8/malupidurebudixa.pdf
    • https://uploads.strikinglycdn.com/files/2d99f453-6195-425f-aeec-03dd54bd40aa/4851838046.pdf
    • https://uploads.strikinglycdn.com/files/ca680435-2e64-4bbb-b881-597578fb2cf0/17619395251.pdf
    • https://uploads.strikinglycdn.com/files/a8649e50-1cd7-44df-832d-9bf7b2e7b584/143984900.pdf
    • https://uploads.strikinglycdn.com/files/31665e33-38fb-45c1-8a0b-57142a0c55c8/fesavixuremato.pdf
    • https://uploads.strikinglycdn.com/files/56a6bb08-ccfe-477a-badc-f56795d869be/kalavobinotalejezavote.pdf
    • https://uploads.strikinglycdn.com/files/3911f9a5-9a2c-4a3e-991e-2d348f6ce023/datusototot.pdf
    • https://uploads.strikinglycdn.com/files/0804d74a-ead8-4a85-9a7b-ef48c8820c82/unblocked_games_raft_wars_2_hacked.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb27.bin
4706f2e2fb05310f30cb4e9607acbc9252b9c7c64e9a2e171604ce191c0bf2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 5532 bytes
font_01_sfnt_off0000fe01.bin
ca31ceca33877c036086048d45a299dc0949581be0780d54ee2429a57ebff6ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 10888 bytes

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