Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5633d063c9d09f8…

MALICIOUS

PDF

80.8 KB Created: 2021-03-22 11:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e64660d250f80f979e8354081072611b SHA-1: d313a1f00ac05276f2b46e8af560987f0dd44ca2 SHA-256: c5633d063c9d09f89fe90921e8b10fbcaaf0c4a5bcfa9132cae7dedae7b68499
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism to deliver malicious content. The document body, though heavily obfuscated, contains text related to 'automobile turning radius template' and authoring information, which is likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=automobile+turning+radius+template PDF link annotation
    • http://jijomaj.getenjoyment.net/lixuru.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/surivil-pisonevawese-benaroj-poneparamel.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/kutija.pdfIn PDF document text
    • http://xuxizud.22web.org/24171980232.pdfIn PDF document text
    • http://zuxenegobepejij.22web.org/zibesusum.pdfIn PDF document text
    • http://famexukox.22web.org/just_one_yesterday_piano_sheet_music.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/positive_and_negative_punishment_psychology_definition.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/actuarial_mathematics_2nd_edition_bowers.pdfIn PDF document text
    • https://neruwutuwi.weebly.com/uploads/1/3/5/9/135960217/4107581.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxuluxusit.atwebpages.com/vande_mataram_song_meaning_in_telugu.pdfIn PDF document text
    • http://tijawob.rf.gd/what_is_a_strategy_map_in_the_balanced_scorecard_framework.pdfIn PDF document text
    • http://zupupizejegujun.epizy.com/lopiwisekukixezanesifotad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c752425-c21e-46d4-b648-78c8e78e84b0/casio_fx_115es_plus_turn_off_scientific_notation.pdfIn PDF document text
    • http://nikonexusopuja.epizy.com/8244574615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde124bd-425f-4e5e-8733-99db98e346c0/how_to_upload_garmin_maps_for_free.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/tisetujif.pdfIn PDF document text
    • http://zezopuvezo.rf.gd/30027419279.pdfIn PDF document text
    • http://moxadokikubod.onlinewebshop.net/tonisebupewen.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 5408 bytes
SHA-256: 5a0c288ade13e0d09d1ff85f91d6fd01428858503464bed8049d5a4b3b6cbc4a
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10636 bytes
SHA-256: 2a0dba8054c7d5a81dd32c29124ab9572957bce293739610b141378aedfe1e98
font_02_sfnt_off00012117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12117 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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