Malicious PDF — malware analysis report

Static analysis result for SHA-256 e867717a5d10b1d5…

MALICIOUS

PDF

89.2 KB Created: 2021-07-03 06:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d3fce30fe5abd1a67da41dd2a4c893b SHA-1: f85c8789c34e75ad8d72f25dab635337acef624b SHA-256: e867717a5d10b1d59cfe10c17cdc192aae8f64e25d2b6092d79706d73f52f649
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and URL findings are sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d5583615c---73639597002.pdf
    • http://stasta.com/userfiles/file/kotebinamawinivunegu.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7badabfb3---62083809811.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073edab70487---14497320011.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/7d2c86a8ebe8955fae4f2908a4853b66/49977056942.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc298e16487---xanuretidefekubige.pdf
    • https://mangonebike.com/uploads/file/nesolibewujogijesaseranat.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/kejenerog.pdf
    • https://fceresources.com/ckfinder/userfiles/files/71188152326.pdf
    • https://dynasty888.com/image/files/20210605_112142.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea550dd6f7---zetejafowugiza.pdf
    • https://questyme.com/userfiles/file/lokoraragef.pdf
    • http://myxroad.com/upload/userfiles/file///feniginasevejakabol.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adc6a0ba39---17976326056.pdf
    • http://abwingscolley.com/uploads/files/93883545623.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/go8tqa22ipc09gc34vi61fd4ku/nigizokojanijapoket.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/rrsblldke2fou35vt6gjb35d8f/domepesoj.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/8b7457a3690930aebfa5dc8f61bee467/guzurek.pdf
    • http://nhs1980alumni.com/clients/878257/File/76647914976.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fc89da035---18980554622.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e28e98ec3---1828901507.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b105b55396e---wigataxepofezakurowugug.pdf
    • http://novussiteyonetimi.com/uploads/file/84035810274.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88c9dd7576---kupirikisesir.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=oxford+cases+in+medicine+and+surgery+2nd+edition+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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea3.bin
0f201cbf969f26fb78b887b7554a91256022144613a08a03cf55feea971f8019
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 11376 bytes
font_01_sfnt_off0001095d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 16792 bytes
font_02_sfnt_off0001216f.bin
10e804f7499e1e60156220d9e39056654b34090fb38840f279bbea48a5cd9695
pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 22620 bytes