Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d05fd97cfee18b7…

MALICIOUS

PDF

96.2 KB Created: 2021-07-02 12:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54455aa073bd61e1369e12c62c559e1c SHA-1: 2fe91df09f27fe6ad0aef8cd63868e7259d280ae SHA-256: 2d05fd97cfee18b7745d36ce00299bd3be7f517564ee24ac0fecd57aa1984181
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://splogservice.ru/content/file/71361759825.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcd97c8b60---76486049872.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f78e85a43222c1e34902041943e45f56/1320117702.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083ac2663dbe---30636397205.pdf
    • http://koszyczarek.pl/userfiles/file/sojixawemorevuda.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b01a21d2---lobani.pdf
    • https://mn-lawfirm.com/box/userfiles/file/66593967820.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091452169967---samop.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/9069b26dc1f098de020066172de41307/kogur.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607faec71543d---dogumemakelupulatu.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ubpkhvpjjt723qmhdh7as02j7t/19371919666.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0936680821---93295572419.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/92o2oa0pjiemtcbtqbk367hu9q/pobupajavufofu.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098924b43c66---gaberovuneri.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/15179ns4a529lk7hpj2njcqdq1/42396236418.pdf
    • http://pnmanagementsolutions.in/uploads/novibidever.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/d036ade15f28a565b686d5c68a26b5de/59361488740.pdf
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/66927703497.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081319ebc40c---sigabumaxotabuxikabolav.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7f3e6ea07---rexikewusububoxil.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/2j547got4gr87khoa31gmo8u5i/43389900184.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ecf8efd51---35998762789.pdf
    • https://efnnma.org/files/file/nibunolisanivaxorepugizu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=new+flame+free+mp3+download
    • 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_off000113f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113F6 16792 bytes
font_01_sfnt_off00012c0d.bin
db9927835e324ae9dd8152429985a8def66516fbfe3d4addbe7ef87faa7610f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0D 10536 bytes
font_02_sfnt_off00014413.bin
19b97640e3f3e5461b8354039116f8098f93f41da4dfd0406568f3101e9aa3ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x14413 17412 bytes