Malicious PDF — malware analysis report

Static analysis result for SHA-256 422ab9436d9dd19e…

MALICIOUS

PDF

102.2 KB Created: 2021-08-19 00:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d976f1d614a17e12929533b98d1ac5cb SHA-1: 65edc4e1a88f521467594888b3a7b3b2b3dee31d SHA-256: 422ab9436d9dd19e0a898579d2ad1b1ec88d597fab8d9f35bfd45c6a3cd8cf6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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=xiaomi+4k+ust+laser+projector+review PDF link annotation
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/85be0ed898876e863c6aa13c41d3e961/34896208055.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210623181358_s41yah.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/4cee78bf75f7735184d664d864df2a42/ligodukemofukonozawusaxo.pdfIn PDF document text
    • http://vipdiler.ru/files/file/43319705117.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/447fc58fdd9f61aa5efeffa19e376f9a/30640392902.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5e65a6f41---kajewikuzekatumubawaw.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/mugukik.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/96c191f0bed2fd927facbb6eb5f076f0/29270838982.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c90384e73fb---kobutale.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e5fb5d329f9---54272752393.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/48cedrhosdb00bjk6755360mte/sizewabexaxagonesan.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/tadomiwabulosew.pdfIn PDF document text
    • http://montesantangelo.it/files/files/fubobijogi.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/snohr30sga0e9seuata84qjut5/85462815043.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/33759116331.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/60244982373.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/55954432491.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d36a19c1ba---vuvuzojupigagejasemiwe.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075478ee3804---85877959585.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEB 2444 bytes
SHA-256: f9ec691d29c2207943a0e1cc9e56232186a5bb13efa18e6d9bd795e313b45fb5
font_02_sfnt_off00012a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A67 18048 bytes
SHA-256: df38f73e2fc4b220b7d04f48c1f3402da281d09801cc985b5b9e35d147e09dd6
font_03_sfnt_off00015936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15936 10992 bytes
SHA-256: 2cf2bd5320b6b403fc73426a355bd434b5e22492513009ae1a596eab5f9e73f2
font_04_sfnt_off000172d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172D7 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

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