Malicious PDF — malware analysis report

Static analysis result for SHA-256 609b85e38c26787b…

MALICIOUS

PDF

76.8 KB Created: 2021-10-05 13:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4adc07a60c6f496329752e945bd2896b SHA-1: 4b69fd0009a3d35617442e82ddabb04983ddd7b9 SHA-256: 609b85e38c26787b1f9f552957cfc4d666d374cc978d5def791e25cca5ca26b8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or are part of a link farm hosted on disposable domains. The primary function appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://garglob.ru/uplcv?utm_term=3+types+of+angels PDF link annotation
    • http://fullcolorspandoeken.nl/userfiles/file/60104403686.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/daxib.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/wuxupovuvepigelojoku.pdfIn PDF document text
    • https://e2imgu.ratnatelenet.com/UserFiles/file/bejijos.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/68238770647.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/87132507216.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/56603820207.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/virazoranosulav.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/74562500559.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/zorikorifavepijawitage.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/47439980548.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/80267833172.pdfIn PDF document text
    • http://strandedtattoo.net/file/98420187274.pdfIn PDF document text
    • https://harmony.im/userfiles/file/63765126400.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/87693934027.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/88046484566.pdfIn PDF document text
    • http://www.moyekolodin.com/files/42375329925.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/3047096151.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/49310501972.pdfIn PDF document text
    • http://itcck.org/upload/editor/file/707053981.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/64467414732.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16158f7dea78bb---81757280329.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/72959936825.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615962cbf346d---jojalegixaninotufodaveri.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161327d54d26e0---maxawagiku.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/mavolatuzumevexokote.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/59394561528.pdfIn PDF document text
    • https://protrialse.eu/files/files/wurovovozakifobezi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC933 17060 bytes
SHA-256: f9a5437a3e6afe9110c7e67df540729a8baee008ee01b7281207e63b500b3850
font_01_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D25 10532 bytes
SHA-256: 93bb13b6211c6f15b01371fe4f2d1bc1e4e195df6374e9445be482707d305dfd

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