Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75a3501f0567109…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 07:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f70659cf475f5e2c2235c5ceaf5c4a10 SHA-1: 96581f04a42a035ef7f69a14c6baeac242ec6eae SHA-256: b75a3501f056710963da66244eda73c6ffd36f4e95eb5cda93fb9fa88a70e73a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, functioning as a link farm. The primary attack pattern appears to be luring users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/b4gi3ba63o961c3il3nq959cf0/totezopukevutezubivasinab.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a58230716---39615427898.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68cc3d52d---63685196200.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/cd52bfcd5c2844c6c658248eae68a11f/70727603003.pdf
    • https://harkakotony.hu/UserFiles/file/68161770920.pdf
    • http://www.petercar0937494634.com/upload/img/files/begeteb.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/40bc4e3d474bf2bcae81fa47d065a063/46794582619.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aa1cab6f8---fixawesadepej.pdf
    • http://cc-loges.com/uploads/file/lorawefobobunuro.pdf
    • http://magogaralbamoble.com/galeria/files/jelenezimosepurox.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/1082b72dd56984267ea1e3a38c3b4734/26742563811.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c57b4d9250f---robumapebojuli.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/8123c31b994e81bdee3847db477fcd09/10037694082.pdf
    • http://nanumed.ro/uploads/files/wakorux.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/6ca63dec0c332c42bc3c3bb612ab5915/11953428719.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/16717962197.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f824302ffad4e88c4f17379789fef3d3/96423750144.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/f48sft10c6pl5kaoc5h520essr/lojat.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/78d98cf9d7ac905f0ced550769ebe8eb/88816214429.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/fa523712b9090d5f90cdae36ed865a17/bijovevinoxipasagekur.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160709dd92b4c8---titufo.pdf
    • http://kemenyseprosiklos.hu/upload/file/netabowirusudofewidoli.pdf
    • http://ural-resyrs.ru/data/file/gogoliretatufibuku.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/936947fca463bc7ef2ba4b1edf97b4a1/sedebug.pdf
    • http://allycatering.com/userfiles/17971679893.pdf
    • http://iberia-ex.com/images/blog//file/mupamek.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=lidl+offers+today
    • 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_off0000ee8a.bin
87bbc055e32290fbb080038b5d55b93de3277a44ac571a90cb67530fdb86a16b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 18144 bytes
font_01_sfnt_off00011e02.bin
df645df554205dd272d15804cda36b588b7610bc979f3041d826006890398ed0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E02 10316 bytes
font_02_sfnt_off00013567.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13567 16792 bytes