Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e85ae07d8e1411a…

MALICIOUS

PDF

85.9 KB Created: 2021-03-21 03:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 287de4e190b2ea0dd00f60cebbb16356 SHA-1: 3faa62513052272542cd4a13b440342682786a29 SHA-256: 3e85ae07d8e1411a4a06a9a38db516aeaefb9ee81bcea087bb8191ddca00448a
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, suggests a lure related to printer troubleshooting, likely intended to trick the user into clicking a malicious link. No scripts were extracted, but the presence of embedded URLs and the high confidence detection indicate a phishing or credential harvesting attempt.

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
  • 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://cdn-cms.f-static.net/uploads/4456378/normal_6023e14771bfa.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_6019d5d808810.pdfIn PDF document text
    • https://cdn.sqhk.co/xinoxoxojib/iaXhage/lakovakujiradodarudurefuk.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/fVgg4hf/house_flipper_xbox_one_download_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470553/normal_603c2683d3eaa.pdfIn PDF document text
    • https://cdn.sqhk.co/vojogalu/RKlIigw/55137839760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_5fda86fc5021f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5fff519683092.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/fCagh33/4415370166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5ff0bf58812f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475875/normal_5ffff964c75ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408703/normal_600654898678e.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/ThdBtgg/instagram_update_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/jisogixij/OijRib7/free_download_rap_mp3_ringtones.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=how%20to%20reset%20hp%20laserjet%20p1606dn%20printer%20ip%20addressPDF link annotation
    • https://uploads.strikinglycdn.com/files/b0d48e24-6c0a-4c7e-8d10-2c5654e80017/world_stock_market_opening_time_in_ist.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/dtv_channel_guide_nashville.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77db750e-e9ac-41f2-ab07-8259fccb0422/ezgo_golf_cart_parts_breakdown.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/31128579595.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/warhammer_kill_team_elites_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/baritiliranorabev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e298ec26-20a4-4691-b683-7c3bae8aeaa8/what_food_products_are_made_in_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/gonevugomovopunoba.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_off000111f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F6 5524 bytes
SHA-256: e4cfdebb450331fb8076f41e36ce373abe448182c891bad354c912ae957247e3
font_01_sfnt_off000124d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D2 10944 bytes
SHA-256: fe26ec389392d875635df9238712237ecc19b8e652407b83f1481298330b645d

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