Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f4771aa8abc0d9…

MALICIOUS

PDF

83.3 KB Created: 2021-03-19 18:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 207a34d26572c1171f4d8ebbf79eff5a SHA-1: b2e352ecf4a1a6424f4aeca273d751ef409901ad SHA-256: 02f4771aa8abc0d9e0f631fdf8cf8cf3b093e0411de7321075f9779ca4493662
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to search terms, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/strik?utm_term=remington+550-1+parts+ebay PDF link annotation
    • http://pipvip.ru/jan_2017_sat_answerss5ofl.pdfIn PDF document text
    • http://filanion.online/amazon_hub_counter_rite_aid_hoursb7rl5.pdfIn PDF document text
    • http://xupenirulavep.iblogger.org/90727782800.pdfIn PDF document text
    • http://fefebigaxef.iblogger.org/14227351752.pdfIn PDF document text
    • http://degimogug.mypressonline.com/pejewarubulupagobiwapel.pdfIn PDF document text
    • http://fobezevuwoki.iblogger.org/jaxesen.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/the_power_of_positive_thinking_book_in_urdu_free_download.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/65334683760.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/Wcrhhii/world_war_2_europe_map_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/dowamagova/dvgYjgc/lol_karthus_build.pdfIn PDF document text
    • http://table-wait.com/office_365_user_manualzc8uv.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/farmacos_anticoagulantes_clasificacion.pdfIn PDF document text
    • http://rabuvuz.22web.org/vita_con_lloyd_gratis.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/80585802976.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/lHpXgjj/mumipiretapoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tiruweditivunaw.myartsonline.com/72665516786.pdfIn PDF document text
    • http://jefesati.rf.gd/how_to_get_toned_legs_without_weights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef34c8d-396f-4814-aaf1-364ccc3c628a/dt360_vs_dt466_size.pdfIn PDF document text
    • http://sowutafamewuben.rf.gd/the_canterville_ghost_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a839b068-7e7e-4c30-8cd6-bf9383334dbc/russian_special_forces_hand_to_hand_combat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5607b00-7118-48e7-89b3-9b3acac02006/kozusovijasufukadika.pdfIn PDF document text
    • http://junikelop.rf.gd/instagram_story_template_psd_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50765cc-b963-4438-9bcd-12544bbbdea2/lavudexodisobebu.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_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 5496 bytes
SHA-256: c332b9e4743d654b6cb31b3630afc00e6ff5e428d042f6df12c65225d9e1cdad
font_01_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 13080 bytes
SHA-256: c18ab7333b2259753fdbd2e6c5540a70a3d13e67cd2ed6187eecdae4c9952716
font_02_sfnt_off000131ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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