Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7138090c638045…

MALICIOUS

PDF

79.0 KB Created: 2021-09-08 01:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 767fd1ada440b74eab45b6e8a3c772e1 SHA-1: e99db6999de3a58060d781710e2f3aa174fb0eb3 SHA-256: 7f7138090c638045370c64cb9fda00e4055283342c935c93062d13319fd23abf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that point to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to these compromised locations, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://philabc.ru/uplcv?utm_term=moto+guzzi+eldorado+parts+manual PDF link annotation
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ncim823pcmrdubk0efrj30t28d/wipifasot.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/161355449ab918---78645932811.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b7edbd1d1929b16ba819b506392cf286/571837628.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5c4417b00---dolegupewidikewa.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161200e81bc9a6---raxiwodudipag.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/6560220753.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee70f85945a---katajul.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c0c500998---jiwivugix.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e6596f21ba9---30161613947.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c72fe0b61f06e6ed9ae8725fc4391df3/64467672717.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f12d7184f9b---72182494322.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/wukenuwilipiwinarupale.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/41738177419.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/31447238806.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/fexoserob.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/9139033057.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/bodaxeginamedofaz.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/qi3ak2n6c4v6dfk151p3qald5e/47455198245.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab63700f7c2---febiduzit.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/83651950125.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/defutobonefeminujodaf.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_off0000cd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56A 18740 bytes
SHA-256: 5f5b9b42cca17222c8c5fd2c84b2dc6b8339da418aa1f3f711bb9c4cafd3b137
font_02_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 10888 bytes
SHA-256: ad71f4dad379c7491848a182708b19e82983f303f20e0071bf117fe955cabcb4

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