Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e671895bc3f385…

MALICIOUS

PDF

86.7 KB Created: 2021-06-26 22:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfaa5b2062061a14458073bd2a9052c8 SHA-1: 2a18453f63ff6d52faa369a643e0a86c2ddfe6fe SHA-256: e2e671895bc3f3852c3d80d61f7112c4acc1043d4d002e8c2e69afed4a708804
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, as indicated by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/fb0bf2ec298484546b39b3438688bbfd/80048226310.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949eab6a9c9---ruzubexajejarivoge.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba4db268a---pejedizalotakoberubop.pdf
    • https://securitydm.com/slicice/file/gunipefefelevenilogemijo.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/b766e82aed9316a36e21071c9d528321/sapadi.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728f1c7b656---fojevimezorekurukamozupab.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/nsc4cqtsb7aim4fdh03hn37llv/75266478131.pdf
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/daxobomefuverolesu.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba2ea05fb---rapufevud.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083290bbd9e5---51479619437.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/b1f64d52fd9b2c74a8b0cf94b4fb4680/63378344054.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2f8f1d91fb8984ca03873837e8e98c07/xanemal.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/cg61a9ivb7a69s0e3sjmlvl345/wiguzabiveju.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/a72037ae24c7333a6d73740c26871245/sedovokatabifi.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5bbca6d51fde4d4b901d2c13ce4d7535/dimizadagekot.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ij3nfrrmeiiv2ashf2nejfqc4g/37788948824.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a49a3d88f---33905718191.pdf
    • http://edu-tur.ru/userfiles/file/28875632468.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094cde6855a6---43907620136.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cba7a3bb793---tinukelik.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/04b9b3eeef81cdb1204d552fbc4281c6/46791837313.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0b03e4bb2---95029079196.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9094c407c---21288095452.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=graph+solutions+to+compound+inequalities+calculator
    • 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_off0000efec.bin
14cc2491976b06b5ab947e0741fd809041e716c20ed98710217d184dc3c4834a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 16900 bytes
font_01_sfnt_off00011bfe.bin
3c0e51da16ea5d30bcc131350f31f05da53e1449cee22b7035f404c5d4c0438f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 11064 bytes
font_02_sfnt_off0001355d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1355D 16792 bytes

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