Malicious PDF — malware analysis report

Static analysis result for SHA-256 d421217046dfe226…

MALICIOUS

PDF

97.7 KB Created: 2021-03-26 12:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 470f4f4b442e78b8c42aefabb68303c0 SHA-1: edd629c4b43490d9fd8edb7afb215eab0f8ca656 SHA-256: d421217046dfe22688a4ba5bdd68693d39f660d35226dfa8e242ee871e081327
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with at least two pointing to suspicious domains ('xezojetit.ru' and 'silekutum.medianewsonline.com'). The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed as a link farm on disposable hosting, a common tactic for phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links strongly suggests a redirection or phishing attack.

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://xezojetit.ru/strik?utm_term=was+the+phantom+of+the+opera+born+disfigured PDF link annotation
    • http://silekutum.medianewsonline.com/sp3_sp2_sp_hybridization.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/ehgggFs/megamind_fish_minion.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/rockwell_studio_5000_vs_rslogix_5000.pdfIn PDF document text
    • http://creditinquiry.info/what_to_know_before_running_a_half_marathongibzo.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/52169131437.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/fKcujik/kifiratix.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/idmhfB5/game_guardian_no_root_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/jjXhghj/skyblock_map_1._14.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/organic_chemistry_wade_8th_editionx1rqe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_60420769bbc2e.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/abu_garcia_black_max_5_parts.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/27320476128.pdfIn PDF document text
    • http://salebox.shop/old_testament_bible_history_guidebooklmqjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_5fd6ed47852b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5273d6d-9690-4516-9f17-32ed0d588879/harry_potter_books_set_1-8_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b291b054-e8fb-47ba-8eb0-620c959a4a05/what_is_the_best_nasb_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c576e92f-160f-48a5-8c5e-66d5646f097f/50052492132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9f679f-6ffb-4efc-8e8e-0c12993fcd3a/4451539820.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/mittlere_nderungsrate_aufgaben.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_off00013fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD7 5576 bytes
SHA-256: 16e29dcba079a9f423e2e5d567eb252bb2fb72f774069bb7d8b113cf3fe64535
font_01_sfnt_off000152ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152AB 11948 bytes
SHA-256: 2501f8372259cf4298037f0c8374b7a03303e4f028918b279f74911a00599829

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