Malicious PDF — malware analysis report

Static analysis result for SHA-256 367bc55b8a647d8e…

MALICIOUS

PDF

100.6 KB Created: 2021-01-07 02:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39fc70dd52e3e9a099dfd010d527c7ab SHA-1: 1a8c95f0d95f73ffa087db4bbc24a501c2dcf4f0 SHA-256: 367bc55b8a647d8e2ea803a1bf00e38b7f62cef8d979052947b88adbbf22786b
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a suspicious domain, combined with a heuristic for a visual download button, suggests the document is designed to trick the user into downloading a payload, likely related to a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=howard+county+general+hospital+jobs
    • https://cdn.sqhk.co/nigulavax/4RKjfha/financial_times_subscription_cancel.pdf
    • https://cdn-cms.f-static.net/uploads/4484093/normal_5fbbf643ee25b.pdf
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fcd377107e70.pdf
    • https://static.s123-cdn-static.com/uploads/4468572/normal_5ff637d8c1c4b.pdf
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fcaaa4a701a5.pdf
    • https://cdn.sqhk.co/vazodowadu/tgdu9hc/pixiv_gif_downloader_firefox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/08f10497-8d18-4d79-8182-627cab2c5743/eat_26_test_espaol.pdf
    • https://uploads.strikinglycdn.com/files/93723dd0-0525-4314-a98c-347ee4d1f8fe/genesis_49_11_commentary.pdf
    • https://uploads.strikinglycdn.com/files/7c60885b-7df0-44b8-8a53-71c5fab6b530/katonah_metro_north_station_harlem_line.pdf
    • https://s3.amazonaws.com/jikopot/jobozalidoguredudapidisu.pdf
    • https://uploads.strikinglycdn.com/files/03bf70ce-7d67-4cf9-827d-6f12bec72745/bracket_maker_tournament_app_pro_apk.pdf
    • https://s3.amazonaws.com/juduk/dim_sheet_first_column.pdf
    • https://uploads.strikinglycdn.com/files/dce4d00c-a067-455a-8e36-38219418353f/what_is_an_apex_predator.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_off000149a1.bin
3d4cef61f6dd2349c1504a42215750b8b1547b06a033d45813b426bfd17aa1d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x149A1 5704 bytes
font_01_sfnt_off00015d14.bin
73703d1a2b3718100898cb5557d74b9b56cd6e5c697ac8c521d8dac848c6f0bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D14 11968 bytes