Malicious PDF — malware analysis report

Static analysis result for SHA-256 1741d892b33af4c1…

MALICIOUS

PDF

85.1 KB Created: 2021-07-01 12:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dadb9aa2b6528f73ef981b6ef03bb858 SHA-1: a4d5ed5909977a54fb29e411ee2ab496e3fc3cd4 SHA-256: 1741d892b33af4c13ae48ac74db1b428ac2822a39ddffaf51e6313ae46e62917
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/hbsvirqn5bs090d7bnm7ueenpq/vulik.pdf In PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/a2b2fb00512733ebbd5acc5bbd176c90/75910166020.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/gomerukolepamobivapope.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cef980b8f19---96493678243.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/7310c0601a17eff60a6a0399764a77c6/56519564618.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/suregedazerumojan.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/5g75brkqoep6bessqph2m76npg/58677773617.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a4c68cc7c9a99acad9b1d8dc835a1ae6/51643368466.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/3211482318.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084882a007d1---14045731017.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160d19c4ed99f2---polexuforizozukukazavimek.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/fivisadeziv.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770eb232633---fijiteko.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f582896c609bacc3d6e7096001d1b6d0/86939034067.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d64554e0c---batokerevokopilosororola.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/0899df0a586f21dbdd50daec1672b2e6/wipowuja.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/kogevujinuxo.pdfIn PDF document text
    • https://2acontractor.it/images/file/ramuzazinefezagukasuzewox.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/pbs0nvllk07qteo5ss6s7odntk/29634830449.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/21691675395.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/oqs2b2ul9ica7qngeatjq6hi04/50404976026.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/firedifugokumofanuxowafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=write+linear+quadratic+and+exponential+functions+calculatorPDF 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

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_off0000e76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 10952 bytes
SHA-256: 27dc17a8fedd248dfc8b0490c76777bf3127aed9e088045616dd8df4068564fd
font_01_sfnt_off000100c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C0 17464 bytes
SHA-256: 42a38583654d28986fc646b5bc1ebe9dfec82bc01c19a5b44cbffeb2de2c42e9
font_02_sfnt_off00012e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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