Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1cf279a852d7ec…

MALICIOUS

PDF

60.2 KB Created: 2020-11-25 12:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ba487607616b318556df4209cd8cee2e SHA-1: b381f0e455dbfe9801df00bfe8cfc7ae3df50c25 SHA-256: 8c1cf279a852d7ec4591593c111e8aeda4cfae8894bab2b0d49bd8728bed64e2
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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/123?utm_term=mca+test+sampler In 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/d58338f9-6116-41cf-8a66-a0e42a4d6c79/41379581061.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/pin_diode_construction_and_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc1ab33-0c77-4590-8c1d-c224ef276f4d/86261393296.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/bixekabefurafalagojogotu.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/new_indian_hip_hop_dance_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa60f4e4-aa64-4dd0-8036-a6d4e01fa2c4/yds_stratejileri_irem_yayC4B1ncC4B1lC4B1k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75124aa1-4c95-4180-80f4-ee42e13323b4/creedence_clearwater_revival_discogr.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/leligebifutifikuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86860164-b3f3-4969-b43a-fa42cc4332ec/tudogafufizef.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/16686020534.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/gcse_bearings_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/tolofidudalogebapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0feeb4-a2ab-4c2a-8442-74eb25dddf5d/93199346433.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/sekaiichi_hatsukoi_episode_1_kissanime.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_off0000b1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B4 5084 bytes
SHA-256: 22050d6411c45e60182989fe612e80c2c49b47c515aa0a011430931ebfc21b39
font_01_sfnt_off0000c2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EF 9924 bytes
SHA-256: 52749768eed0913bfd437eca5941292af10aaed35f52ed3c23491e0f7ec86c06