Malicious PDF — malware analysis report

Static analysis result for SHA-256 64020a7f98575719…

MALICIOUS

PDF

67.9 KB Created: 2021-09-25 10:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 81f6a016d4e812833a1bd96520262718 SHA-1: de41f8553e77781e50ac44178bef2bac50b9c204 SHA-256: 64020a7f9857571956bd969c54542aaa2e30faa31b192ec9c82a569f1d8b12b1
176 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing or malware distribution. It contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://2ds-creations.fr/userfiles/file/7006518620.pdf In PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/nisosijoxubav.pdfIn PDF document text
    • http://sdes.in/uploads/saramig.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140655c75a20---76148461289.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/sekufulotijupopusewetaz.pdfIn PDF document text
    • http://fygl.net/uploads/file/181522063902.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/59295391606.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/ponavobavunixogazepa.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd9b737579---tavorajofesisojekin.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210910170853.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/tovuwanivevoruguxovenemo.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/25083721168.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/xewupuz.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142b68a723bd---kefinovutalilemebikuz.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/jozunemava.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/42kck7k8004o0o6dioam9h41da/wiroluxiwilepijobo.pdfIn PDF document text
    • http://spakimthi.com/upload/files/19195014561.pdfIn PDF document text
    • http://skomi.ru/img/files/file/68717547434.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4bc68ac2b---lezovuwaxowuwinoxuwutajuj.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210916020612_343740.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/mobifalokoperibuv.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/naxavu.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///dupitelanelob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+difference+between+ios+and+androidPDF 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_off0000af15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF15 10716 bytes
SHA-256: 7e476f3f02b9f483f2d674f9a325a9d8a0c934999349a0e0a2020939665d7f7f
font_01_sfnt_off0000c7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC7 13764 bytes
SHA-256: f2a00f38377a65c97457ba4e19d7b8a2bda326fc05d6b1697d3f5791252569aa