Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d00f97a9b2deab…

MALICIOUS

PDF

80.9 KB Created: 2021-04-09 01:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7096956c47cfbf6470b2b8cb68988f7f SHA-1: 3cb097709e2ce7db45133eeb416505c9c2df82dd SHA-256: b6d00f97a9b2deabe43d51c63fc357f4e37e2e9482da468c3d11f347fda1a026
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or unknown reputation sites, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to recipe books and application metadata, indicating a lure to disguise malicious intent. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/strik?utm_term=best+air+fryer+recipe+book+uk PDF link annotation
    • https://cdn.sqhk.co/fiseguvugele/geb0Pij/big_baby_tape_weight_genius.pdfIn PDF document text
    • http://hydra.moscow/calendario_2020_para_imprimir_por_meses54st3.pdfIn PDF document text
    • https://cdn.sqhk.co/kutupejotige/NYiaSji/23501824227.pdfIn PDF document text
    • http://raisinslabs.club/17185965414n16xv.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/jamcIgc/24113503573.pdfIn PDF document text
    • http://cashbackk.site/283018762466qlwp.pdfIn PDF document text
    • http://wonder-ita.space/keduzumaxew676op.pdfIn PDF document text
    • http://usesucre.pro/programming_chamberlain_clicker_universal_remote_control55tpb.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/pipexulenuzuvatila.pdfIn PDF document text
    • http://xovuwowim.mypressonline.com/hunger_games_1_english.pdfIn PDF document text
    • http://matimomewojime.mypressonline.com/78658863804.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/j8hZifb/sandwich_sudoku_app.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/VGZgi1Z/street_racing_syndicate_ps2_cheats.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/600228dc-b24c-4099-9d7d-9ffc1fe60843/vogiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/ninasunebikalo.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/nejud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b4b2c1-934c-46bb-a96a-b00d55ab8c6a/milulenorufubefiwojusamam.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/bolero_full_hd_movie.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/54867915235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77e5a95-e984-489d-b7d9-5fc4b99cc7b5/words_that_start_with_deco.pdfIn PDF document text
    • http://xawavejemefo.epizy.com/makeup_artist_logo_vector_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93992a01-16c3-4849-9aea-465100930ccf/kitchenaid_mixer_food_processor_attachment_review.pdfIn PDF document text
    • http://siwavubixuvavil.rf.gd/56929713001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b343bd89-3fd4-49aa-8285-7b7f327012c5/tibevudifepogiv.pdfIn PDF document text
    • http://rukanaka.epizy.com/modern_industrial_organization_ebook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 5332 bytes
SHA-256: 8de524b1a194b8a66be83733670590f2544ab85a2f5bc7a160ddd1e57977101b
font_01_sfnt_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 2552 bytes
SHA-256: 1a3b3021cc2fb857be9cc817f4f761475ebcef864076955a760aa5cca1880b6d
font_02_sfnt_off00011048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11048 10516 bytes
SHA-256: 18bd7f31c5c07adc42f5c98c6e8f5500fe05196a493808a890199f566bd61079