Malicious PDF — malware analysis report

Static analysis result for SHA-256 6186f8049ab93c94…

MALICIOUS

PDF

74.6 KB Created: 2021-07-03 11:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cff2005987db32b6b9af2b344a3f5c52 SHA-1: f25719f4fec2bf1097fde18e76942472dec4bb38 SHA-256: 6186f8049ab93c949e0b413242011545a1aff1a6dc5f5d58c7446c89639d6a6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and links to compromised WordPress upload directories and disposable hosting, suggesting it's designed to lead users to malicious sites. The file's structure and content strongly indicate it's part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://nomylo.ru/uplcv?utm_term=word+link+level+555
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/bls84o5t13ud52rqs28u59bkdu/vimufadofezedojoramu.pdf
    • http://chukgoobok.com/files/fckeditor/file/15593087610.pdf
    • https://pointvirgule.ca/upload/editor/file/newawuxig.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/52e2961ebb52cdb440dfb71393d11eaf/80490718706.pdf
    • http://ccsl.asia/files/18731654144.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfb06dd3c8---larimosoxezaxi.pdf
    • https://socohoteldanang.com/uploads/image/files/sisototatogujugepip.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b13e8ee4774---3520201784.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af9d2d086a5---xojivorarakuvesatubafim.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719e7bd64cd---20058273497.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/92209379200.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/nnm5erej19ofj6bdii6cjcf440/78637693104.pdf
    • https://allcreaturesinc.com/files/files/95049924524.pdf
    • http://www.pics4us.de/userfiles/file/73746294978.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/f121347e3ba557ffdd51b4b96fc38b54/63407913865.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/ecd92fb9c6ab7303e17dd12990c52acc/wizugolet.pdf
    • http://win-sonic.com/kida2018/ck_imgs/files/lavafofiburugepoxufedoz.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc18cab2307---pezodenoxumopo.pdf
    • https://asiarsolutions.com/userfiles/file/23833097905.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160887d10d8d71---kegekogipojugatigotos.pdf
    • http://bociany.sk/media/file/nelurulaxoxik.pdf
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/karawazuleb.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd5d2c95b7---banobozuv.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f135ea0133---98230517694.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cf4d0dac1---66192316051.pdf
    • http://tipiland.net/upload/file/gegerilikalakod.pdf
    • http://massimomoroni.it/userfiles/files/76500531425.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/09p7im2dc7hv3kgjif4gfkkrf5/wiruzoxugove.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_off0000c425.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC425 16792 bytes
font_01_sfnt_off0000dc37.bin
800ad7dedd442025dfb6883e2305c6115ee981d4b4082c02602e7a5228993529		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 16312 bytes
font_02_sfnt_off00010690.bin
f8f95ce15525f7ff4cc317763f8f45948dba71ffd5d9da2ba1230e8a14380298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10690 10096 bytes

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