Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ae903d6074633d…

MALICIOUS

PDF

83.7 KB Created: 2021-03-13 19:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 764832400851ec652ab671bcde3a8c08 SHA-1: b15711a674fbd99cb0c4cb7bfd5ff2ee78bcebe1 SHA-256: e2ae903d6074633deee38896279885df32baf118b84d1249ae9dafd20c924690
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on dynamic DNS services or file-sharing platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect users to malicious content.

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://botokaw.ru/123?utm_term=socrates+philosophy+of+education+pdf
    • https://cdn.sqhk.co/suvotoruwot/jeje7oU/22853236828.pdf
    • https://cdn.sqhk.co/temetixufuxi/cHhafgc/28939503940.pdf
    • https://xevududugomiti.weebly.com/uploads/1/3/4/6/134633411/10862.pdf
    • https://vojutodebol.weebly.com/uploads/1/3/4/0/134096580/aa0d706.pdf
    • https://cdn.sqhk.co/gulifunanale/igtjiPq/best_video_downloader_browser_for_iphone.pdf
    • http://kijofizovurisos.medianewsonline.com/33121116168.pdf
    • https://cdn.sqhk.co/bipadifudame/jhiauAJ/lelerajenatotazubi.pdf
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/womidax.pdf
    • http://13millions-warzone.store/flak_air_raid_freezesztmga.pdf
    • https://cdn.sqhk.co/zebenane/vPigjie/game_booster_launcher_screen_recorder.pdf
    • http://sazinoz.mypressonline.com/1981006437.pdf
    • https://cdn.sqhk.co/lebinezekoma/sicWTif/werewolf_similar_words.pdf
    • http://fuckfrsky.com/pawirimoluposojubaditap3t930.pdf
    • https://migomazi.weebly.com/uploads/1/3/1/4/131407029/c6fac6ea.pdf
    • https://cdn.sqhk.co/samigimas/UhdmfcA/istanbul_devlet_opera_ve_bale_mudurlugu.pdf
    • http://gugolufixa.mywebcommunity.org/ielts_reading_recent_actual_test.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://soranodabiwegi.myartsonline.com/zafawetevuwokumupidexuw.pdf
    • https://s3.amazonaws.com/kabisebax/safari_safari_song.pdf
    • https://s3.amazonaws.com/lopadivupudexa/92193633200.pdf
    • https://s3.amazonaws.com/wonumafubij/guided_busway_route_planner.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_off00010695.bin
037d26e62d03254473b28866ccf03d9f274508cc58acd8e96fe9c1e9d5ca6f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 5448 bytes
font_01_sfnt_off00011925.bin
e17b087b80d35a81f4cdcfc70ce061635afb286c1597b74d6fd483a94b322acd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 11772 bytes

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