Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b320c4da9179ac…

MALICIOUS

PDF

75.0 KB Created: 2021-03-21 09:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 57cf28a747ef3c7c10eb72d209a60570 SHA-1: 9c1372865f2066e0ad8ce1ca20a2aa23c8467b65 SHA-256: b0b320c4da9179ac5878fe46cdcdafc29bb64edaf05dca9a8bedeaa3add7b319
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or link-farming operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of disposable hosting for SEO purposes, reinforcing the phishing lure.

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://kuzutuzo.ru/wix?keyword=naming+aromatic+compounds+worksheet+with+answers+pdf PDF link annotation
    • http://sevagawos.getenjoyment.net/sirew.pdfIn PDF document text
    • http://vigirorimikana.medianewsonline.com/phn_mm_ct_trc_tuyn.pdfIn PDF document text
    • http://megiloreb.mypressonline.com/strategy_definition.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/boxito_catalogo_2020.pdfIn PDF document text
    • https://tikuvafijosil.weebly.com/uploads/1/3/4/6/134685963/rigalepur.pdfIn PDF document text
    • https://medefidonirefej.weebly.com/uploads/1/3/5/3/135324812/bupoxiparono_tepezevopipa_xubikupurot.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/how_do_you_redeem_pokemon_code_cards.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/94071616219.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/sixth_grade_math_worksheets.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/emerson_thermostat_manual_1f80-0261.pdfIn PDF document text
    • https://labaveboto.weebly.com/uploads/1/3/4/6/134611097/xuxafobeme.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/sojapevigiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://watusatuvor.myartsonline.com/82331780942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1daea29d-42e5-491b-8a1e-88cd8b7698af/kupemigebikufidit.pdfIn PDF document text
    • http://zijedan.atwebpages.com/toguw.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_715c6f474ba640fc87e0c41e22832f39.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57330d4-172f-49d3-8871-c70439d52fa9/vicks_germ_free_humidifier_filter_v3900.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_a1daa509be1e4ffea73fef72a1bd3743.pdf?index=trueIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_e3af649b26bb406dac2fd080013425c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b866f6c-e100-4a7f-ab08-67da3e93ddf4/axial_scx10_iii_transmission_gears.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a67ed1-dd25-4591-ae46-ff505ec1b6c0/gravity_falls_journal_3_blacklight_edition.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_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 5664 bytes
SHA-256: d26d2adfc3f369d175230fb0879bd8b19afcf9e8bd4e8098e89568aca9683505
font_01_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 10632 bytes
SHA-256: f8eff789ccc7fac14b381b104ce6dab81b6e2581e6b7ca2475bb14187122523b

Open this report in the interactive analyzer, or submit your own file for analysis.