Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bd0cc7cf04a90f…

MALICIOUS

PDF

72.2 KB Created: 2021-03-06 21:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 5aaf407c482ee22dc00f8d7587e33e97 SHA-1: 6007fd1b04496dc4891145f14d3e310b3a2e817b SHA-256: a5bd0cc7cf04a90fd565a26b28fdee9c91e0a0363170b8149197a1285ea4a08e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://dugedepap.ru/wix?keyword=post+oak+savannah+map PDF link annotation
    • http://activa-fb.com/vawifazolivebigajoxenevobm41.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/85191227329.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/cloud_9_movie_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fc7bbe906822.pdfIn PDF document text
    • http://milanbeachs.space/the_aeneid_book_11_shmoopru4o7.pdfIn PDF document text
    • http://xtreme-sport.ru/familia_cannabaceaev7tyb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391611/normal_5ff81ee0b7d57.pdfIn PDF document text
    • http://retys.space/skyworth_smart_tv_50_inches_review8qqpk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://losikamadan.epizy.com/wivaguwofolejedetugizin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911c9148-e217-41f6-8f77-915877678fee/2452132411.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/haier_mini_refrigerator_settings.pdfIn PDF document text
    • http://mosupixozijet.epizy.com/60795989513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb5a440-3e3c-43ad-aab2-148e7723d009/why_is_my_dyson_v6_animal_flashing_red.pdfIn PDF document text
    • http://suginuzebaluwom.rf.gd/87698487506.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 5056 bytes
SHA-256: 17c611bc1109f5ac41fc6f7df7dc528aab7bae585a8b7d7829ec61f0face5dfb
font_01_sfnt_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 10292 bytes
SHA-256: 88b5509b63ebf9e34e14475ff9de438ba4f19f9dd33fdeab2aae38cff5cf1297

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