Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf48ef1993597a9c…

MALICIOUS

PDF

79.6 KB Created: 2021-03-07 18:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c949b381031226e80fc99afd09082f15 SHA-1: 61ed48b59d65e920b306f7005206a3acc04142db SHA-256: bf48ef1993597a9c92ae112ca572ae92c88f86ab5223fa05b783cb712761cd5d
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting and embeds external URIs. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely using a lure related to vehicle parts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/123?utm_term=ford+l8000+parts+diagram PDF link annotation
    • http://zasasibibo.iblogger.org/35479467590.pdfIn PDF document text
    • http://rotukefune.getenjoyment.net/pitadaxezijutiron.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/sat_grammar_practice_test_questions.pdfIn PDF document text
    • http://loberas.22web.org/41694690933.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/xamapebonijos/viber_video_messages.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_2fe8e55a328c4761a180fd02f3443f06.pdf?index=trueIn PDF document text
    • http://muliwavanebebo.onlinewebshop.net/what_are_the_types_of_covid_diagnostic_tests.pdfIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_de2424571e0b4d71bcbb02896f8d28ae.pdf?index=trueIn PDF document text
    • http://fuzulaj.rf.gd/muninanarewakawigosej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba42e91-610e-49a5-9a17-2c08ea1d688f/pathfinder_horror_adventures_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d18cda-ee31-4f1c-b247-459e346fd997/jufebepufemog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc547a2-7aad-44a2-a67e-cc1eb4f6916a/hexa_block_puzzle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931c749f-317a-461f-b1c6-7fa9a9abb739/93971181979.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/sap_crystal_reports.pdfIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_be9e69d79fea4e2bb8ae80ec2378dad3.pdf?index=trueIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/8012303174.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_49a4cdd41e93458dbcb4d61ae62c0d46.pdf?index=trueIn PDF document text
    • http://xeravujowa.epizy.com/23455678648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68813641-ab80-4e8f-a7c4-513799f7af41/74873635144.pdfIn PDF document text
    • http://dalegesezo.rf.gd/7_habits_of_highly_effective_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/thank_you_letter_to_professor_template.pdfIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_e479ec0f19ae4c7b81aa70bac043a970.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_b7d4c7759fd04b35a9fc8f57d8f241fb.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_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 5572 bytes
SHA-256: 305672985df2ecaab0009075d72fdbbc42b0190b243c98db476d1f10526b4a18
font_01_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 11156 bytes
SHA-256: 6a32ad6b850b20067c20b735ab893462f521b1f28a6e0937451be7e7f68e74b3

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