Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ee44678c4c4075…

MALICIOUS

PDF

95.1 KB Created: 2021-06-30 12:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43491dd3b989838a2691781b897a715e SHA-1: 41231261885daa86986c2698876fd0ec2af7716e SHA-256: b9ee44678c4c4075ac9bb040f4da57512ccac39ccc5b2beb8fd9ee80ff5af2e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious domains like pixomot.ru. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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://pixomot.ru/uplcv?utm_term=the+accuser+in+the+bible
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1833ed7a7---37794878066.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a733119b738---joxawavo.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8b6470139e70933465a3ebfc0258c193/peramiruzifapapepevevan.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086da154a4e3---guwud.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e43f5e2049---piropo.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/s72h6tb90fitisct9arkr9u7a6/64734292735.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e476cc45e---14526870205.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/vnic0j12818l1gt4das8tifg4h/redetowodevujesatofumor.pdf
    • http://deryalvincotokurtarma.com/userfiles/file/lejukiliram.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bb17b413c8b---tukex.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925ae491c4e---5876976542.pdf
    • http://prinsart.ro/uploads/files/gefum.pdf
    • http://samnakthodrahassob.com/userfiles/file/51507495271.pdf
    • https://creteservices.com/FCKeditor/userimages/file/62348161626.pdf
    • http://aryajob.com/user_upload/file/pejeg.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xapetejiguxawogul.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/24b6e9896b42f5265766e0f2443e2315/sibobuwotojadodizekarozem.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/918b793042402fd80fd69bb86565976f/goraxuzexuwevokejon.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9f9433f0---vetifibaxagubefiju.pdf
    • http://ezibra.pl/upload//file/72960252189.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ks53fbpuf4c29ga34nlcn4h60m/15760171631.pdf
    • http://forglass.sk/userfiles/file/91916113572.pdf
    • https://noithatkuongthinh.com/uploads/files/kevinesosagimiwi.pdf
    • https://galerie-louise.be/userfiles/files/94697909468.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2df7af16---70896668291.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/93bfbbf485092bfd2223ef19228a08ba/53201391391.pdf
    • http://sibinetweek.ru/userfiles/file/bizij.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0d2501a5e---49116628432.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35c.bin
da1c6221ab550f13afd2454e3991e63edf10c527c7c57f0456699a3a687d9581		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 19884 bytes
font_01_sfnt_off0001259d.bin
c5e2eeaf04ed845db60dcd42731e5562b56e2426bdb418626dc502f1d59468d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1259D 17080 bytes
font_02_sfnt_off00013ecc.bin
50a2d478c2ce69e83bbd64a2062f641fcf52b1f994d2aa6754a25d0114ae929c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECC 10408 bytes
font_03_sfnt_off00015649.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15649 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.