Malicious PDF — malware analysis report

Static analysis result for SHA-256 863c3ea20d26f180…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 09:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22cc966777b80aa5286e150d2fc1ff63 SHA-1: d39cb987261af1bf4bf5b3929c68764ec1857078 SHA-256: 863c3ea20d26f18046c5aad7e6a4f38fd7e78e1ef9ea9ac782027e4977e6702c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that function as a link farm, directing users to compromised WordPress sites and other potentially malicious domains. The presence of these links suggests an attempt to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://krisoc.ru/uplcv?utm_term=can+you+microwave+hot+dogs
    • https://habibitours.org/ckfinder/userfiles/files/taxurafaxelumafabofuvot.pdf
    • http://emannsltd.com/userfiles/93469214938.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa7153ede1---delujefumikametofomawep.pdf
    • https://genegurumiraclehealer.com/userfiles/file/sumitorulolodesegejuf.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f9581f34d---xozedaxibi.pdf
    • http://saltokisport.com/uploads/files/guwiroj.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/lahr823qh8rhpj7ighcftmkbdm/11244205378.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ab878c907a3---26005197182.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/sd2tu3oh18duj946khi29vkj0g/zizofa.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a07f4aa758---73477305054.pdf
    • https://anmimar.com/royal/userfiles/file/17950453104.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5114e0927933d6dc04d4868584b808df/vajerawiki.pdf
    • https://tedvandergulik.nl/userimages/file/luguxa.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c929f3a2bfa---53302884969.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rt06ousvc28oh0eual8eks78pk/59408974978.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ae950ea3b---63072963171.pdf
    • http://copingconversations.com/userfiles/file/31533961093.pdf
    • http://yngc.ru/admin/ckfinder/userfiles/files/65851914564.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071f957d3287---95016331054.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095a2576348f---pokagekekumabogisip.pdf
    • https://napraforgohotel.hu/upload/file/kamabegilarazuwol.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_off0000ead9.bin
84da94b14808960dbe059e078ec3b295d96012eff684ddcc4ac48c749d77f910
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD9 16808 bytes
font_01_sfnt_off00011656.bin
1f01c348708f2504ae81b9a2dcb8a1c94f13a08b4783ae7942f33dddd679a2cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11656 11168 bytes
font_02_sfnt_off0001302b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1302B 16792 bytes