Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dff74e755fe42f1…

MALICIOUS

PDF

72.0 KB Created: 2021-09-18 06:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d87bea26fd1f73c353215684508a4464 SHA-1: ccf52d8b8b7fdcc1cb623f19dfa189917d0afc52 SHA-256: 9dff74e755fe42f155712e8016a0c45f99b67fd9bdef04cc8e6ef4466d069758
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://synerhu.ru/uplcv?utm_term=minecraft+apk+torrent PDF link annotation
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9ec63c0e5cdb061d093e30a595a508e8/zavesetob.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/jasisuzagazubizekisivipir.pdfIn PDF document text
    • http://zimmerei-possert.at/liliduranozofubozukiw.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/sifudasoxarebetopilimok.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613676ed30a24---notubatenoragari.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/pexilozunupigo.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/48313457125.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/bijelipadawedib.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/kevemisunujoxix.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/xanutinusafakegitevifoj.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/37849421420.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/zuzabasiboxaxanukam.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306b083f8bb---bunutaliri.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161404ef78573c---66286688483.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/42281275554.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/vibavu.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/14649733892.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161405e5648f69---jagekemenatosa.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16135928c896a2---bepipozopudimoreroti.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/karum.pdfIn PDF document text
    • https://magicdiscoradio.com/userfiles/file/nifagufiserep.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451a4b26f90---tasisilelixa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4A 15792 bytes
SHA-256: c115ab1d4d26825757b9dc053c0ff22190eb34fe1b3537855d0cb8c64659fd50
font_01_sfnt_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 10344 bytes
SHA-256: b4dc0aae4b8449e7043227e02da6a94773b5bf8edaa2c628d1977ceefc13ddc3

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