Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0f4025d40d3adc…

MALICIOUS

PDF

101.7 KB Created: 2021-09-03 15:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 848a4b85a7abbf97225b2d21823f8755 SHA-1: 1d566e5d4209ca52e0909032dca32a39cee969ce SHA-256: 1d0f4025d40d3adc45278c372fd2a9b8f258b6bf80fde59c321968f734ef3ac1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting domains, which is a common tactic for phishing or distributing further malware. The presence of these links suggests an attempt to lure users to malicious sites.

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 http://lawngo.net/fckfiles/zopirenawawavumaviwigufow.pdf In PDF document text
    • http://adria-ex.com/images/blog//file/23293119562.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c0a4aa133---59449797239.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/81297919297.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/25938199764.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/a8r3napm2rvaisko5miq8l8av0/6649909304.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/l7t5o271hbb1do54opfrblkl3q/mixorabinozizeja.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/49472095185.pdfIn PDF document text
    • http://linker-apps.com/files/vopovexejemijosinemon.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/40784094696.pdfIn PDF document text
    • http://texmet.pl/userimages/file/muzit.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/85347624492.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/66021496649.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/90766f93a9851d1d9d8902af9f4dbc18/xifabizenerozedomo.pdfIn PDF document text
    • http://cctsjwhs.com/clients/0/08/08395bc9c2b8280888f0dabd04457394/File/duriwak.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/bf613edc05e5bde819099813f42e8aad/tikilajum.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610bcbb5148b3---dovelulagikulinexaxoku.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/ce6141343bc29487ab4a781c3ec84f3d/pomilidasuminesojogev.pdfIn PDF document text
    • http://m4krichmond.org/clients/3/3b/3bf4c986be49c21931b3574e72fd8103/File/92798547347.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/70341641766.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/gokadelividosazi.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/mamibexanomotom.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/tumorudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ikea+hektar+lamp+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000141fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FA 18308 bytes
SHA-256: 6cc704116fe9b32cdd0522d9005f06e3dd7463750a413604f1bcc6054af2d4b3
font_02_sfnt_off00017209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17209 10280 bytes
SHA-256: 6b734f23e9b7f53f07fffab2efe5113b75b28c1727e2b87290e1b019982ed98e

Open this report in the interactive analyzer, or submit your own file for analysis.