Malicious PDF — malware analysis report

Static analysis result for SHA-256 658a5d62b25186bc…

MALICIOUS

PDF

75.1 KB Created: 2021-03-12 14:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04e89d023281d37551a49b8860a41c51 SHA-1: f11a5a2c184b0c66400e44addd1edde80165f0e7 SHA-256: 658a5d62b25186bc22c81524898a392ac4156dbc0ae80f15ea8d5d7c1cbc03e6
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 machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('jumiwimov.ru' and 'fesufobototezer.mywebcommunity.org'), suggesting a phishing or malware distribution scheme. The PDF structure itself is identified as a link farm on disposable hosting, further supporting the malicious classification.

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://jumiwimov.ru/123?utm_term=guided+body+scan+meditation+free PDF link annotation
    • http://fesufobototezer.mywebcommunity.org/apoptosis_unam.pdfIn PDF document text
    • http://devubowoku.mypressonline.com/8108905981.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/odzibhJ/jazer.pdfIn PDF document text
    • https://cdn.sqhk.co/monekuli/jeTicVL/best_homeschool_programs_in_va.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/tintin_et_le_secret_de_la_licorne_film_complet_en_francais_streaming.pdfIn PDF document text
    • http://majinukosazo.iblogger.org/the_monkeys_paw_summary.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/a_discovery_of_witches_season_1.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/Yfgj5hd/prop_hunt_maps_gmod_no_css.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/vepunotejefuwuninozag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5369330a-f5a7-4214-9a8d-2b7e40a4c99a/char_broil_tru_infrared_electric_grill_manual.pdfIn PDF document text
    • http://loxosufodu.epizy.com/guxaxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c08681-2b6b-48e6-a37a-270725315efd/is_moultrie_ga_a_good_place_to_live.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/ue_boom_2_speaker_not_charging.pdfIn PDF document text
    • http://xivobipitu.epizy.com/occupational_therapy_definition.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/10354044083.pdfIn PDF document text
    • http://zerekigukazaja.epizy.com/android_emulator_for_pc_windows_7_starter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903214a9-63dd-4eb4-a5ec-48ff4409f2e1/zazuzeru.pdfIn PDF document text
    • http://sarutufasiko.atwebpages.com/mimowadokenuwogefojirap.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/13744375179.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/92070469703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6a5a5f-37f7-4209-b0ab-e22a3f02f571/53856891926.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/asus_update_bios_utility.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_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 5408 bytes
SHA-256: f1a2ea5e4ebd93f8b2a18a94872615c752d5073c55c0e571c3b2e10035f3f258
font_01_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 10132 bytes
SHA-256: dc79255c6cd37792945be0b2a4a6ab2e31108c20108b76d72c140ee5a55bf599

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