Malicious PDF — malware analysis report

Static analysis result for SHA-256 79959f2b2639f363…

MALICIOUS

PDF

69.4 KB Created: 2021-01-06 09:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d4626995a1e1fafb7fca5051be5090a0 SHA-1: 6f88a557874bc41d73add9a5fff45a771457b43d SHA-256: 79959f2b2639f363049bb668cfd980b6df8323eca9d32c6850cea9d5b4d244c6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=blue+corn+atole+benefits'. This indicates the document's primary purpose is to lure the user to this malicious site. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffking.ru/123?utm_term=blue+corn+atole+benefits In PDF document text
    • https://cdn.sqhk.co/sovokeduseb/Moozshj/pitched_tuner_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/b5bjajj/beradovapuzodidumuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/19126310549.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/amma_amma_vip_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/logo_game_answers_pack_34.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c805c387-6a5b-44da-b48c-38dee658b7a4/pindyck_and_rubinfeld_microeconomics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bda29d-208d-4c0b-8fd1-ba8c3f6157e4/light_bulb_cage_covers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5332f7-5adc-4f50-a3ab-392343373ebc/wofiwanufajaziguna.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/reporters_without_borders_turkey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09ac6a4-1ef3-4f9c-8ebb-b78404dd06bb/xazunegefu.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/journal_of_breastfeeding_filetype.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/first_aid_management_of_epistaxis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be2855cb-8c6d-45ed-971b-05c24cd449d4/italian_to_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbbcde5-0023-4948-9573-e5a24a4d3df2/steel_and_flesh_old_mod_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/xunotazerile.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_off0000d37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37E 5064 bytes
SHA-256: 8214992cfeb542ae872a9ee805e8afe87b1a117df3c86c956422e7b3d5a4274c
font_01_sfnt_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 10764 bytes
SHA-256: 8c1c34c3593fbb0ef00e6095e1f104d697dde22511acb6711f28077baa68927d

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