Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb48b127fb4852b1…

MALICIOUS

PDF

67.2 KB Created: 2021-03-17 02:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7092dcad67fc50aa08a918f1fc30d548 SHA-1: a8872c605e98add03dceb10d12eefe70b2ec62bf SHA-256: bb48b127fb4852b1c8c20b9fb12ce532d6b10cc7778e8ffb24a2008594e5cd6a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, suggests a lure related to 'Richmond times dispatch obituaries search', indicating a phishing attempt to direct users to malicious sites like https://ponafet.ru/wix. The presence of many external URIs and link farm characteristics 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
  • 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://ponafet.ru/wix?keyword=richmond+times+dispatch+obituaries+search
    • http://oneitstore.info/2058426932vx60z.pdf
    • http://bedomukuruxe.22web.org/how_to_round_down_a_formula_result_in_excel.pdf
    • http://xupokaxe.medianewsonline.com/42453933595.pdf
    • http://theporte.xyz/stewart_calculus_6th_edition_solutions_manualjlopd.pdf
    • http://penexej.mywebcommunity.org/13915922562.pdf
    • http://instapresent.site/biographical_sketch_examplejjg7e.pdf
    • http://ig-copyrightnoticehelp.com/pdf_to_word_online_jobllt97.pdf
    • http://heretythere.site/what_do_you_understand_by_religious_tolerancervuko.pdf
    • http://dorightunion.com/adjective_comparative_superlative_worksheetm1t0l.pdf
    • http://widonatozeg.mypressonline.com/kezudugatuzu.pdf
    • http://edaruzal.xyz/11931970649ro7gx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jewofeket.onlinewebshop.net/iglesia_adventista_culto_en_vivo.pdf
    • https://uploads.strikinglycdn.com/files/84963fb9-3401-484f-8ffa-8495d2d24882/zavomurofasukidimut.pdf
    • https://uploads.strikinglycdn.com/files/dffb38b5-b1b1-4701-a25d-dcdc663bad0e/rozizevis.pdf
    • http://sivikonalijuto.myartsonline.com/cyberpunk_2077_get_delayed_again.pdf
    • https://uploads.strikinglycdn.com/files/3b2f520d-e6ab-46b9-8c39-2b5ef0662945/86794791162.pdf
    • http://kokivifox.epizy.com/quiz_questions_movie_theme_tunes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b0.bin
1d4d2d93371e80c28e4a0eeb0422d98629ac9f936ac48398ebf47c81a139fe3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 5428 bytes
font_01_sfnt_off0000dbf1.bin
3db75dc7d4cb6b2c97f17f9efc2a4853a6413d4fa8ad8921408e5105c9956b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 10544 bytes

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