Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ce5a125e6780d3…

MALICIOUS

PDF

84.0 KB Created: 2021-04-05 19:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d9a56186b4d863a7fe061eb6b0346a32 SHA-1: c2c9b175699d9fc9460b6a5dd2ffa4b0ea2c952f SHA-256: 08ce5a125e6780d3d4f0f76868c0a389d0bbe18c6ed93e912b186a30420e2e46
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains, and includes a UTM-tagged URL suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing malware or conducting phishing operations. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=ps4+games+2021+sports PDF link annotation
    • http://rankingcoach-seo.com/lemakazazisidefalikekaja2ynun.pdfIn PDF document text
    • http://raifaisentgo.online/dorupujewuroreloriwicrjry.pdfIn PDF document text
    • http://teaitalis.space/betoboxojusab2kuop.pdfIn PDF document text
    • http://wisecreditscore.info/12191501755496ht.pdfIn PDF document text
    • http://save50.pro/uc_browser_video_er_freep4bfy.pdfIn PDF document text
    • http://beautytopshop.site/fatumadasefobul3q1s1.pdfIn PDF document text
    • http://xazutakivad.iblogger.org/xogilipimabiluvuk.pdfIn PDF document text
    • http://coolmag.biz/what_is_the_meaning_of_originlmwzm.pdfIn PDF document text
    • http://50offstore.pro/death_in_the_cloudsppy0b.pdfIn PDF document text
    • http://vovidumuf.22web.org/total_conquest_unlimited_all.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_0bdb1b4b1ef24af08125393aef946b28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/820e0c1f-d91a-492b-920a-b724758f993c/28207667776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddcc4ed1-3a0a-4311-82ce-b1f063e574f6/48177727345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff5917d-b25c-4fbe-9380-8701d1ede47b/vejojizavep.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_acfef82e218245a4b0fa919d6f9e4878.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_c450b76bbaf747f8b59f0662cd5a152c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a2f96c6-36dd-43f3-8e12-bc1bab321399/dymo_labelwriter_450_turbo_change_label_size.pdfIn PDF document text
    • http://fokogemuzaraw.epizy.com/baghban_movie_dialogues.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_off00010b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B53 5524 bytes
SHA-256: 706b07c9b4d578b42237a67aef3b4cf351c8f2c1fd3555b1387d66ab2a0ca3fa
font_01_sfnt_off00011e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E11 10888 bytes
SHA-256: f54c82a05995d2d040b0a48b49cdfd8e91388fd48c1649b483a4a04a44c23d2e

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