Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3281b44fd5d97e…

MALICIOUS

PDF

102.0 KB Created: 2021-04-28 17:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5138a6c97d524a9c4471c132360ebb83 SHA-1: 858b928a439e7f69b3095c5fc2c5f721fddf5980 SHA-256: 9d3281b44fd5d97eb4c1960c16893951e4abf668419abf3a6663d3f9b07fb962
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute further malicious content. The embedded URLs are likely part of a phishing lure, aiming to trick users into downloading malware disguised as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/bt00s7hlgmluk97m88n3ikvs66/kanavoxidolilenudamuwel.pdf In PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/8odhfq1lkc3ngfgob4i720mtjo/tebudasaguwofosel.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f371a30fd2---sulobuzezopazatewoneworo.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/b4d802877d1ae946a21ff09f4ea12316/52517720395.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd26d4ad58---5696367356.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f037c495f---ranedodufinerelitos.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/2e8e4feef67c81da6cf4144d7ac02109/96308359602.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/5ff71f6aaae3bbc77446a780de8470a6/vitam.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081acfaebeeb---vegeb.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5e867d2aeb93b54b7e458d58301e9241/97325207009.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086764917b0e---wetopij.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/aj68rmi6bqpsvr3rvf0d1lgebm/4371713650.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16071af5b90cfc---tikazexaw.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607d28c314624---9400721589.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=chevrolet+captiva+ltz+2012+manualPDF 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000162ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x162EA 17256 bytes
SHA-256: b329bf0e358e2416536177cc066641e1f4e713a8ec4e089cbcd70e40284961ab
font_00_sfnt_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 7388 bytes
SHA-256: 1e6b2619296f742c5d4b38e8ac4eed39e12636af4756e29bc57a4e605d0e028e
font_01_sfnt_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 5336 bytes
SHA-256: 6831c4ea50561bca3005ba2edbf2ddca01c9d9dea4d3b5178dbe30145129f9de
font_02_sfnt_off00012727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12727 7100 bytes
SHA-256: be4e040c48f3beba6dfef504e907502b8ddd0ce9941ba0d98329067e018da8a9
font_03_sfnt_off00013912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 12528 bytes
SHA-256: 6d09484dc99a7649f632fdc024fe74ff93b7ea79a18236a7b29b930759a45602
font_05_sfnt_off00017b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B9F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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