Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0892ff3f98bd0f…

MALICIOUS

PDF

86.3 KB Created: 2021-05-21 15:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: aa0c181141e46e67f3f818675d8e28fd SHA-1: 5b00bac22857b90b3ae425df619a0649155451cf SHA-256: bb0892ff3f98bd0f4761f07dd81640d72329f38050a13c8c1b3294446f200c6b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with a primary one pointing to `https://mezovuduw.ru/strik?utm_term=how+much+steroid+is+in+budesonide`, suggesting a lure to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall structure and heuristic firings point towards a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=how+much+steroid+is+in+budesonide PDF link annotation
    • https://gemiletux.weebly.com/uploads/1/3/2/6/132681217/978cbb.pdfIn PDF document text
    • https://nejituxunexako.weebly.com/uploads/1/3/2/7/132712325/cb4cf55db1a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_6032f36222c74.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/3602c72a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484812/normal_600817fc51bda.pdfIn PDF document text
    • https://zibesotisudub.weebly.com/uploads/1/3/5/9/135996238/8b231.pdfIn PDF document text
    • https://zopopalolidipe.weebly.com/uploads/1/3/4/5/134500843/fasoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_602898e3ba1f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_600e64e3dc37b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_602dfb8de6e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_6056bde19977b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/draw_the_electron_distribution_diagram_of_a_water_molecule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2691e4-ee6f-4be3-93f4-619a2735e54b/ti_nspire_cx_cas_ii_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481b8a02-9075-49a8-af09-5b7f06bed5c8/24149589914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569c1bfd-27cf-4bd7-a564-a62cdc5cfe13/50093716317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8c20b5-4202-4c05-a783-733e06b8b0c9/dikefizejatabonowozopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3828670c-5912-4434-b3f0-c65fa333ae73/how_to_program_genie_one_button_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/characteristics_of_information_for_decision_making.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b0a8c5-bdbc-485f-9922-9b41ac708e8f/94449938939.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/66799443222.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/que_es_la_altura_uterina.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/jumpsuit_lyrics_deutsch.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_off0001158a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158A 5132 bytes
SHA-256: 55fc28e0e09db287ecd957c7113fcecf8f36bbf8d3b38189d5f9ab999ed30f46
font_01_sfnt_off000126e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E1 10896 bytes
SHA-256: 2d831602fc55b962a99408d0f952db42597d446e6da365f925e0338ad67f7a14

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