Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6476160b0c85847…

MALICIOUS

PDF

96.1 KB Created: 2021-07-08 04:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a91a81eee7bc67973f39660966b34ef SHA-1: a8cb1e43a5324a05da503378026daff21f2e3ede SHA-256: c6476160b0c85847b3bb299683ab8b8f54cf22ab1e545cf0c7d96cf8f70d5ddb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed to evade basic detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://archism.ru/uplcv?utm_term=fallout+4+addicted+to+chems
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/41bcfb804af21f957a7b8134845854bd/32042777374.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/a107805a1ed164c5fa81ea2024c7aea6/tamekimuwumonugufimitag.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af439d9e8ce---4194450289.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de2272a2fee---54057156358.pdf
    • http://rapet.hu/files/jofukasamafoz.pdf
    • http://zartmobilia.com/userfiles/file/20210517135345.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a0e061a6d---44509280674.pdf
    • http://marketypik.pl/zdjecia/fck/file/80049852496.pdf
    • https://nffcd.org/userfiles/files/33176476617.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3786a3e2f---83955480329.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/q4gajbtic3gi2351vhl160724j/43842064624.pdf
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/jutobapilisu.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210703215000118.pdf
    • http://christschoolblr.in/userfiles/file/nokasazemezuguxem.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/wemumexejuxunopiromutejis.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/51746127edad4fb2cda9bf9743e1d529/mipewozosinukat.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609df354f077c---zuxosupagu.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/736cksfcnd0hffjd8gk3metiu3/benomazinolobesikisividol.pdf
    • http://dynamic1984.com/user_file/file/57716001100.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/870ecfb3bbeec538c1977f3fdbf76306/5817806175.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/3dfe0aec16883d92347b77260b00b238/dulamabezonosabopun.pdf
    • http://s292376414.onlinehome.fr/datas/imgmail/file/24855923690.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f4.bin
f1bdca15d794a3e428bfe63ffbab051801aeafefeb06b4f85bc4d5eae4a71acb
pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 19096 bytes
font_01_sfnt_off000137ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137FF 16792 bytes
font_02_sfnt_off0001500c.bin
562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
pdf-font-stream PDF embedded font (sfnt) at offset 0x1500C 1860 bytes
font_03_sfnt_off000158c3.bin
9361c8c8d6a8d180eebae1133ed94d3b86241118cd88aa923792e2e3b44dce54
pdf-font-stream PDF embedded font (sfnt) at offset 0x158C3 10588 bytes