Malicious PDF — malware analysis report

Static analysis result for SHA-256 172ac5f1e7238f05…

MALICIOUS

PDF

82.6 KB Created: 2021-09-04 03:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1f3b26485fb27fc335eadb91785930f6 SHA-1: 9b996b16bcceef23ea48b4f0834ea825468fa57d SHA-256: 172ac5f1e7238f050f98883693156f2ebbbde04287140a6429a884823f0ba676
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a phishing lure, indicated by a high number of embedded URLs pointing to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=canon+eos+750d+manual+espa%C3%B1ol PDF link annotation
    • http://master-br.ru/img/file/78021837835.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/72669385455.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2f20f3acf94121eadb50074c9e08f727/63208356520.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210516065733.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/13700355297.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ab8e2266---80967985122.pdfIn PDF document text
    • http://webursitet.org/Files/file/levezopetaxigowuwilebo.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/duma7dlmgpoimlp7pjadvte926/movuxineroxite.pdfIn PDF document text
    • https://maturana.cl/upload/file/45017298138.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/o68e9oq8br767t8nqjctci0sst/supetalodadugakalobege.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/a4877b2d978b97c2b91b21d442531498/kedopigofesuxopaganul.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/gamowu.pdfIn PDF document text
    • http://kbchina.de/upload/gojezuxisapito.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ncc63nlpki0gdlj6vmrmcqt3ud/74689911714.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5a211df94---vobumoj.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/lijidorukaz.pdfIn PDF document text
    • https://eslms.com/userfiles/file/fadobupusoka.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/0e4ba7152ff93728e10030186458cf60/61126708782.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/77100270467.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/16581901094.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/fotuwigonejiram.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160944dea4f3f5---94334587803.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/823c500b5434a074bd728ac6d87e99b6/18394573879.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F2 20652 bytes
SHA-256: f4c1bd723007caa673766e7aee690b76b2126f6240e808aa73fd31e61b698d5b
font_01_sfnt_off000109e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 10904 bytes
SHA-256: 19684d0035f5afd61489cf2361e29473423db74055fb0a179332e6fdfd72445f
font_02_sfnt_off000122f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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