Malicious PDF — malware analysis report

Static analysis result for SHA-256 980294689dac338b…

MALICIOUS

PDF

113.5 KB Created: 2021-06-18 01:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d3cabbd0aa98fd02a1ba6c43d6825fc1 SHA-1: 641b58d9befd8d8a7b727d9948b2dbbabde45715 SHA-256: 980294689dac338b2ae7590638d85d2f52bdd378e4b6e9cf2a61f20dc2f7ed57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ketchas.ru/uplcv?utm_term=chello+divas+2+release+date PDF link annotation
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/3ssme1iln3chl13es5po5p0lv6/garifesilakegon.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/98534848624.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/lowodurone.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/mewozuteravixigolajisef.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2805c80f06---pipul.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ca63a98091c05c1812dc2858c1d6995a/93896101535.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e9f419530---paxudukagid.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/39282277848.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/36af27489a20a2bf2f07b2355e3e099b/33980923044.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2ba063ab4---katobububiwewoverali.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/phb7lhp04tijr7rp1ventuch7h/lowekivarumetenofexatik.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a0d827226---92349276710.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/janukalibizetuvax.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/36393189435.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/eb80c6df482db2822bf5d46a581f0e38/80119627853.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AC 5008 bytes
SHA-256: b3a267bde4850a7311fb4d6b3b27f207e1edb0bf76643b769f40fcf7dfd64c3d
font_01_sfnt_off00016aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AA9 4564 bytes
SHA-256: c1e2456975e4eb774a9b45a590427b2ff77a8c9e68fb243dee898b0e4b9a2b39
font_02_sfnt_off00017934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17934 12232 bytes
SHA-256: c698435917206bac1317ca14b2bfdb18c27fba7aedcaa501ce96028689109cb5
font_03_sfnt_off0001a2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2F6 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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