Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b0430139105890…

MALICIOUS

PDF

84.6 KB Created: 2021-07-03 08:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2aea2192173db6e8bf309acab6dafd7 SHA-1: e368059a821d579ec38d3762cf78507cef76c770 SHA-256: f6b04301391058906ad1a5a99d839fbca601377bd2199cf802265505605ab083
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress sites hosting PDF files. These links likely serve as a lure to download further malware or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://soba05.org/wp-content/plugins/super-forms/uploads/php/files/08a290c6dc7a1c74d4e7eedf44cd6735/gawesijuvifan.pdf
    • http://thementalhealthadvocates.org/files/userfiles/file/9354357464.pdf
    • http://3e-recycling.ru/app/webroot/filesfiles/jekijukimawo.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cbe483ac---31527943077.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/74732147993.pdf
    • http://lideparts.com/userfiles/file/1623128490.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d112937653dc950cb1a68995de814824/14174104978.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160722f77358c1---19579912558.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/6498b06449314f5f5644cdcc61d4ece5/jilusapanivexaj.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/bvbe31kjff2v43hmmmcmi36jld/salen.pdf
    • http://groupkaishan.com/d/files/66270760431.pdf
    • http://rialta.ie/userfiles/files/50950710775.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aec2b0a103a---kirel.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/501ab621bf2b624956239261abae2a4f/gajak.pdf
    • http://beastyenergy.com/userfiles/file/fesidopiropakofelep.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b4957d5f8---jowedulutozafa.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/75238902525.pdf
    • http://schodylux.pl/userfiles/file/jaxumabufotakidabutel.pdf
    • http://www.huntsvillepr.com/files/files/xagujuzalaxiledud.pdf
    • https://livresdarts.com/ckfinder/userfiles/files/51804751280.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/n7vo7b2gquj2vja6au1klgd2t1/88004072364.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/p0364v5dd1oith7rrhli4iipp1/88587631784.pdf
    • http://transbur.ru/admin/ckfinder/userfiles/files/20750636579.pdf
    • https://mszukam.pl/dat//file/pujobosakafowemezazukefo.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c48a0db0967---fudax.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=philippines+drivers+license+template+psd+free
    • 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_off0000e7ad.bin
8fcdfd71a030769e88b2cf8d6b4a28b6b674a47ceb44ec707ee8298bb52cc5e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 10832 bytes
font_01_sfnt_off00010075.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 16792 bytes
font_02_sfnt_off00011887.bin
fc1784717135a9d741bcce053fd93417412c405616598838d819914c2e7a9074
pdf-font-stream PDF embedded font (sfnt) at offset 0x11887 17344 bytes