Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee192b6915205cd…

MALICIOUS

PDF

88.6 KB Created: 2021-07-02 06:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc3f215e1b94efd1cb0beb2dcd9ddf2f SHA-1: 5155606fceb06339f23a8359e4ed8361415049d4 SHA-256: 7ee192b6915205cdcb2ae61e27ffa849a931ef660fe8a6dc8a17ea71b359d45d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://queure.ru/uplcv?utm_term=add+video+indesign
    • http://sixtyguildersresearch.com/admin/photos/file/nonegekidikofefigafizus.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702d1ea3117---xawiladixuk.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/0500bbc49705ca639694599375027751/83472033727.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/iibrthuivq47qvber2fho5nun0/91941637251.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160a318bc48411---6688461148.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b67dc85e638ca88720b6c97abc63db04/raninulelevovak.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/49f196d744600238f74aedaf9a7fa2f0/66247125921.pdf
    • http://arslanemlak.come/file/bomad.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c796f3000---rawadojapegibefuwe.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/4a908f510c38263710032ca3b058faff/35274721958.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c63772b6b7f---dosinufi.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077cf207dd27---81209789715.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8963b9766---13701201541.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094580fd26a9---zedezekezerufusak.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5903d1a7c6---42533615550.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/03a21abf8811a9acaf2bf8f30a86d767/zojukovawawinawuponefobav.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/vvknmfva0217kmgisqvqdmgqa1/41438663111.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1955f9b3---digewewimeba.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99bc80bb53---36873729086.pdf
    • http://yossy.biz/userfiles/file/domolek.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26d31ccc2a---gewiruxegofibelewozu.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/m7fneph8qulaqth2k323flero3/rifeji.pdf
    • http://elcampoeco.org/FCKeditor/file/zapopewegavivesoza.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee41192f48---zorowinokebaba.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_off0000fb75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB75 16792 bytes
font_01_sfnt_off00011387.bin
b0bf7d728aa8999d0334e17ed1955df5bd4ff2d70334ac884a052d5358c43a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11387 16580 bytes
font_02_sfnt_off00013ed8.bin
6d337b47c6c84ae4388e8914b883b2163aa220f09f27c26fa8b412d8fc1b1565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED8 10064 bytes

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