Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcad0c7c1d77b96…

MALICIOUS

PDF

73.3 KB Created: 2021-02-16 07:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a6111a320acc90afc537fac98e8e21f3 SHA-1: ed013d7d721e02654607abab7906fefc3813fc30 SHA-256: 9fcad0c7c1d77b965d56cbceed29c77b60393bd2f36bfdac9f6a12d2ba6f7c8b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting it's designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=evenflo+stratos+car+seat+installation+video PDF link annotation
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/zewabaverotanadumex.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/fjiChev/cosmos_movie_2019.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/5781281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_600fcb97e5a3e.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/wasajapojunix-pumivobazafa-depeselafigok-gilazot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_6024bfc05f8c5.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/53260427163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5fd3158875893.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/ggJGjeb/world_war_z_2_movies_2017_download.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/video_show_lite_app.pdfIn PDF document text
    • https://pibiwija.weebly.com/uploads/1/3/4/8/134896476/7901017.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/7Wifbje/disneyland_monorail_stops.pdfIn PDF document text
    • https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/6db10b.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/juvuraguvutoxif/farm_machinery_value_guide.pdfIn PDF document text
    • http://sesugemedolaf.rf.gd/guvobudatudogamu.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/electrical_wiring_test_report.pdfIn PDF document text
    • http://pewusufep.epizy.com/bitumen_sheet_roofing.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_off0000e339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE339 5032 bytes
SHA-256: 45a75041abe76dbd673fabbdf994945c10fc6ad015e86dc5c7f43d7952c24911
font_01_sfnt_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 10428 bytes
SHA-256: 192eacebc9be46179ef79067b104f3a745f93b415082897c7114b0642a810c89

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