Malicious PDF — malware analysis report

Static analysis result for SHA-256 46727dd811a5fbdd…

MALICIOUS

PDF

77.7 KB Created: 2021-03-31 19:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: d0cf2b32801de30431278a3e9a87f2ec SHA-1: e7cb4462e552de8d1d684051635b24f3d36bb08a SHA-256: 46727dd811a5fbdd6759a9673b64c8b7c6a8d7e26f6e61f1654c3ad8407b4ca3
184 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though obfuscated, suggests a lure related to 'burrito bison mod apk 2.85', indicating a phishing or malware distribution attempt. The presence of multiple links on disposable hosting further supports a malicious intent to redirect users to potentially harmful content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=burrito+bison+mod+apk+2.85 In PDF document text
    • https://cdn.sqhk.co/gawukale/gdjcPie/defugiravoxokibe.pdfIn PDF document text
    • http://wukuname.mypressonline.com/firenogilalekivetupe.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/54860765645.pdfIn PDF document text
    • https://cdn.sqhk.co/sivojadirabe/bijihjT/tropico_5_cheats_xbox_one.pdfIn PDF document text
    • http://gifozizonumili.iblogger.org/chandrasena_hettiarachchi_new_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/fiibH4q/rabixumavu.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/45a8de55-1b82-440d-82a3-f90fc8de1d66/cuisinart_bread_maker.pdfIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_86b334848a834badad5c473ad77ce2cf.pdf?index=trueIn PDF document text
    • http://kefixofelapadi.epizy.com/95639016874.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/dunkin_donuts_drink_nutrition_facts.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_d91ee37fed474a1199ee49c7413fb3d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabegokek/search_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/wapuputazufosibux.pdfIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_3bbd3faf5b404cbab678d8050bb71791.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_f7b6d8e21b2c43709422395ad8a090fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2301536a-bcb8-4ca5-8e79-36b69fe94abb/fantastic_mr_fox_film_review.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_9e7daebce45144ac927866fe14c0812d.pdf?index=trueIn 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_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5808 bytes
SHA-256: b72317bff2e7826b59ed76c1477ffc71151ec1a7d2c6dfd9e9de8e61067afb16
font_01_sfnt_off000103c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 11040 bytes
SHA-256: 65761caa8ece77796e505cbae8ef19130f49ed2bf0a478e33cd86c33fc38388a

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