Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b2446ee40a31ab…

MALICIOUS

PDF

94.1 KB Created: 2021-07-14 05:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab096d6bc4be5c32b800a4c5d4901bf5 SHA-1: ee3c7435ad53c2e57d07c8751206f228cb9d936a SHA-256: 10b2446ee40a31abf5fc95e8b0ab57d2798c7a10bb72b779aa79b25b294b606b
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to compromised CMS uploads and disposable hosting, likely to lure users to phishing sites or download further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights the non-clustered nature of these links on disposable hosting, reinforcing the phishing or spamming nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9104ca8c2e648124f7b383bebe1a6320/modalawevufotapagejefo.pdf
    • https://textolinguisticsolutions.com/upload/editor/file/78305702314.pdf
    • https://chmelo.hu/sites/default/files/file/livipaxoredalazegojafir.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a878c219d93---ferutiza.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072809ce62b4---valesogipexebututa.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/6b975a48828be0d84a2dfb021c10770c/87791608463.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a835bce8b2---78017670040.pdf
    • http://automotiveenergy.cz/userfiles/file/6986811411.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/53006354847.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160783e2ca719b---nisokedodamejegip.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d4a7a199a---21047511361.pdf
    • https://panificiopasticceriabattaglia.it/file/xobufokoxifadosowuterava.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/61moqnoig4g7u9stsvl76fmp06/35065187615.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a0a51f371---bumitedepawoxudonok.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8e0266a0d---20059956501.pdf
    • http://hart-metale.pl/gimnazjum/userfiles/file/4923890498.pdf
    • http://tianfonmm.com/d/files/46982186120.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/3jk7fo1tupqqf8d5b6keiv2tpj/nujobijukagorusepi.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa8f77db29---mikepejavabat.pdf
    • http://gmkms.net/upfile_editor/2021/files/40905125553.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608880e12a7d7---gosafazu.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab545239809---gadunenobefetogiloxopa.pdf
    • http://adance0112.com/upfile/editor/file/ragabetijidekunepowomel.pdf
    • http://mqskin.com/luutru/files/91564409901.pdf
    • http://jinxinghotel.com/uploads/files/modijisapixorepegawepasi.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606da0e80fd2d---fivigizuvukek.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=future+bow+wow
    • 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_off0000f472.bin
913601d5006eff0e6816e9c649189651d422a6bf04b5365c367fafba67da6844		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF472 18220 bytes
font_01_sfnt_off0001249b.bin
e3018192a09061e40c42345709dcc25bab60db75435df5ae9249edffefa5006c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1249B 9832 bytes
font_02_sfnt_off00013a59.bin
66b7945b99a9c78025a9a0ace4161995b24b08b80ea391fd428eddc3553bac27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A59 16544 bytes
font_03_sfnt_off0001511c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1511C 16792 bytes

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