Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dadec136fea6feb…

MALICIOUS

PDF

90.2 KB Created: 2021-06-25 21:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27186fcc487d43034cc1fde64b6fa4dd SHA-1: 8185761d500d7edc0c9c4a051658299ba6acd1fe SHA-256: 1dadec136fea6feb9d2ebc0e2381b442e4bcfdf26ba80e2629e5743bb4b696dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate it is designed to redirect users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=bagel+bites+directions+microwave
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839bb2bd51a---firojafomolixenewag.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/5621373531.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160834536e31cd---magunobonagejinapa.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/98891568294.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae3064419---dojov.pdf
    • http://maychamsocda.vn/images/userfiles/file/62224488704.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/nobirasebimikozisodavike.pdf
    • http://bualuang101.com/backoffice/upload/files/fosux.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6940bbecdab476a553c61cd795d85106/gobaxewasopinijemazafo.pdf
    • https://nanyangtextile.com/userfiles/file/80641667310.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dedf3bc14---27226023240.pdf
    • http://market-oborudovanie.ru/upload/file/86620598268.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607a83a6b349a---84371027596.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ffob03t7hsfbvhhpq8a5ofl765/21201284187.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f05bce7276---20839766681.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083277b6bcc0---fuvarum.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/bregft3b2gbdcomeqt0q604l5b/tizufemel.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/edke17emjvpsp62jl89v4l4qk7/lolisoguwi.pdf
    • http://birnagarcollege.in/userfiles/file/68133374169.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925b13d6c82---5248300184.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/d00b99788a8fe1be56b0a466afc6dade/73845746361.pdf
    • http://cgl.lu/userfiles/files/7414740924.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7ba323fc---14336644110.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_off0000f912.bin
ec8e19b0ea64895fb17a85f0fe6a817c546326c9e60a14e3971460c55b6a850f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 11056 bytes
font_01_sfnt_off000112ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112AE 16792 bytes
font_02_sfnt_off00012ac0.bin
d7075b2045746379f1c3fe7b0167bc930aed22a3274e3423338abe5865c0287c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC0 18320 bytes