Malicious PDF — malware analysis report

Static analysis result for SHA-256 0298f282b222f501…

MALICIOUS

PDF

112.1 KB Created: 2021-07-13 22:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 11af9cdc77b838b1d99e3137fc318af9 SHA-1: de39b06a3e65c7b77b1a9cfed1c66f53080d794a SHA-256: 0298f282b222f501346e5fffe9a1235ab8287c771521e7beebcbd8f5049688b9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs, including links to compromised WordPress sites and a raw IP address, indicating a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm designed to exploit search engine optimization or distribute malicious content. No scripts were extracted, but the presence of multiple malicious links points to a user-execution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607767ee31e51---rajas.pdf In PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e62499ad50---jagiwugiweme.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d2968b9a911a9441363f8e27e81b92ce/70804254206.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/lilixu.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/1498853372.pdfPDF link annotation
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16081416488590---kijifavulusefevipe.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/061fd15eb89375b91283c1d65ef36f77/filiwotagud.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed54c1f864---sebotadukakojigoxidupaxig.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/1010d5d359faa78d171d807216be8128/tusevonewiv.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/wifusorowix.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/7582750404.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/7784eb22353e120ef5b9f54424303cd2/kalotubo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8709f6472f---jobekedemabixetoja.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d1f1be7414f65cf6d349e71eec3efa70/4785345344.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078038409925---15715292937.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/rj05snajrgj6san6fmiu3ingn4/79950141569.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/nmn765nu0farc266b6t3h9huf7/59182988251.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/jixiwiwasadiboxusovubeb.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210714014643.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/35228281198.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6dd6798e70e34f52b4b48971d91394be/49505737124.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f29a48423---lifemesojuge.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/karosidutowol.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8fae3c0c---79041822301.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+did+you+get+that+way+how+did+it+get+this+wayPDF 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_off00015391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15391 10568 bytes
SHA-256: 95a1c1fcc8114d08e97f3bc17595c7ef2f68d1f847eb58d2b096c0ab0fbfe533
font_01_sfnt_off00016baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000183bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183BC 17504 bytes
SHA-256: eaa3d7d9690a2b14f25655a48bced9c1cd33d991c49b35e591dc05911654f133