Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5a6fa7e7a2efd5…

MALICIOUS

PDF

77.7 KB Created: 2021-07-19 23:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 296ed05f86236c8ae8193cf46dc1a0d9 SHA-1: 62fbd67ac329e224daabda656d1bc1455e135f7d SHA-256: 3e5a6fa7e7a2efd579b6d9faf452fcff5f36b490be213ea6c0c04a4f595a4bc9
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other domains, suggesting an intent to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://havadisname.com/upload/ckfinder/files/rupoxowax.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/3949746989.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb517da5678---nagaliseluwuzafifivowese.pdf
    • http://kino-cosmik.ru/sadm_files/kopekufu.pdf
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/76451727961.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1lan5h7uvq00upr6tevmedmcp4/rujozubuwijunimugegu.pdf
    • http://connect-senior.ch/uploades/userfiles/file/nosolosuxogujawemoga.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/9b6d08jm8d3kiolub1g1c51tas/rixerosonuvojeladibagi.pdf
    • https://muguet.fr/sites/default/files/file/55728223231.pdf
    • http://bkbflooringusa.com/userfile/abbey/file/favekeditilizijowevepo.pdf
    • http://anthonyvienna.com/sites/default/files/file/rotozujewanad.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2806393817---13233180131.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ac372143---19478279733.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f21c4a24c8---kawuk.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/qpol4tihnmkgbu39797cgn81f7/zilum.pdf
    • http://ros-grad.ru/fck_editor_files/files/98962867921.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/214ee91a093eba0a1df51e71e4b50d33/ramelegevinisivow.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/009f4926f8c02c4f0acfa56922e060b4/nafewuwesupade.pdf
    • http://traiteur-ribot.fr/userfiles/file/budurofug.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b93358e86---24015127813.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/sft8770a6uli6no4gnmnljeif7/83915783211.pdf
    • http://wahluenfty.com/userfiles/67775762629.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796d15d0668---3237299223.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=surface+area+sphere+and+hemisphere+worksheet+answers
    • 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_off0000cc69.bin
96ade0b248bac06cb465e016d99ed8fce178ec7436fdc2f474d881dc41195f47
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC69 16484 bytes
font_01_sfnt_off0000f712.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 16792 bytes
font_02_sfnt_off00010f29.bin
24a5292b680085f377b01eed57ceaa891fd7e99eca2c0aa954132329788772ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 11192 bytes