Malicious PDF — malware analysis report

Static analysis result for SHA-256 1103ab25294d464e…

MALICIOUS

PDF

80.3 KB Created: 2021-06-26 13:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9dfa4a8c255ce52d9e2d487db97c7dc2 SHA-1: a5c3e9acc52da9834452bff60fad9d5b3f2891f6 SHA-256: 1103ab25294d464e630e4a02e42d0b5497ebafbdcb75fd30c1e3768ebb864058
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised CMS upload storage locations. The embedded URLs are likely intended to host phishing pages or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6f61c7dd2---suxum.pdf In PDF document text
    • https://perfecthospital.net/FCKeditor/file/nogogujulajad.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/76112991056.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/c67fdtfjeuehh81l6j8jg0o0m3/1165295738.pdfIn PDF document text
    • http://tano-cable.com/d/files/92437424553.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/gajitovurarujudawabuw.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/98210506495.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d27d924c91c---61702721310.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/gevudenodalimefuxovin.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9a71474ec---97399253509.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/mapomokasox.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9d15dcc9a---rolopuxarofibinafezubene.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/34024486842.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe22758adb---37405094489.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c398b0c75ab2a93b4c067ca4a89f4f50/20578132342.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/60800437057.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/95353090031.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f3e618c1f92dd9df00d075be1c90ebd8/voxukatomezagemozini.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/miwefewexu.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608956a001d88---230086276.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/e43dcb26d4fe22c9c75b13b94961cd8c/xovepef.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/5qitamadffcdkl0gh0nivpk92v/murudikopavilifirudigiv.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/mebazolonoz.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607effc50ffb6---64967261647.pdfIn PDF document text
    • http://yoron.net/up/files/dikox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=casino+operations+managementPDF link annotation
    • 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_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 17032 bytes
SHA-256: 99c7026602ef9f7360c1393a734674d0ae53a3c2de2be7ab52726603bdabc39f
font_01_sfnt_off00010349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10349 10580 bytes
SHA-256: 1ec53b1fce5fc8cf6ec06297dcb819908d0d228aa5b4bb843eeabee617e95205
font_02_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1