Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8ebe98dac5403a…

MALICIOUS

PDF

81.1 KB Created: 2021-07-19 06:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b2107c4c915098756af0c763a44f293 SHA-1: 05b0c1090b5ffd3da654beda44673816cc01cdd0 SHA-256: 0d8ebe98dac5403a4a85a1ec2d784b63d53ba6d6f4b49b2893b1b2dd981b3a9f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm and employs social engineering tactics (ClickFix) to prompt user execution of commands. While no scripts were extracted, the document's structure and heuristics suggest it's designed to lure users into running malicious commands, likely to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://www.psychophonie-tarbes.com/ckfinder/userfiles/files/13953159576.pdf In PDF document text
    • http://marcobernini.it/userfiles/files/33336883671.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/49179203088.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/bukigajajasowa.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092633d04740---70858632405.pdfIn PDF document text
    • https://ovalpolycoats.com/media/42413309536.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/surunasigok.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caee7e499a---divogezekafuvizi.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/fojoluzuwiwub.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/nuzevarunozegapebifejedi.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/rjg9j7e64f0ar3h83rdst2l75d/54364953698.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/6ed8377c25f037d39781a32bedd11601/kegelovinomefezisibomajar.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/92426086994.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/3dd67da524fed06062d03253ce07b5dc/fetesixewu.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/fewurifarokit.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/84298662333.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bc3b6e73d---napibe.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/vilepixabuxanufedariz.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/renamudosux.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/cdd915f0e6ee4346b83241eed93e8968/xoxudatarilewamajisuw.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/ef31ad8e8c9318ad0595bf452ada3bb6/1283828898.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=wii+u+gcn+adapter+driverPDF 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_off0000d856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD856 17320 bytes
SHA-256: b4340a9898544c5af4e01db34e107162ee31ba21a1b18d0597869b7c73419be9
font_01_sfnt_off00010614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2B 10512 bytes
SHA-256: 3098da65e0a8168b03ed43dc789754b8d9d49da33ccd7315762b865468baa99a

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