Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe528f3883d8df3d…

MALICIOUS

PDF

86.9 KB Created: 2021-05-12 20:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c41599ca45c32e670c94564c6eba14fa SHA-1: 10fba7ca5ee6ca0f5a9e397db488c5d36810b060 SHA-256: fe528f3883d8df3d6f16ef0d0bc6a3ce89295eb4a9447bfae4da198056d28035
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=can+wireless+xbox+one+controller+be+wired PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/xizigisabalazezevubetujom.pdfIn PDF document text
    • http://premium-cinema.com/omron_bp742n_5_series_upper_arm_blood_pressure_monitor_costcoa4mc4.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/detapagurizizagevix.pdfIn PDF document text
    • http://bapikiboz.iblogger.org/corsair_k95_rgb_platinum_profiles_download.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/fire_and_blood_300_years_before_a_game_of_thrones.pdfIn PDF document text
    • http://satopek.iblogger.org/lofaxasafigagobew.pdfIn PDF document text
    • http://euroshopme.site/99795987262ym5um.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/rikiridusokovusakupo.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/29505442735.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://koxolavomuzo.myartsonline.com/fareviruxisulikamigive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43be7d48-e818-4f6c-b093-f89cc9ee799b/mibamepugibejokibojeruvi.pdfIn PDF document text
    • http://kiranero.rf.gd/what_is_the_job_of_a_general_contractor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185fb2af-d9a3-4f31-a628-0804f49e5973/17491620256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbafbbc-5a44-4102-90d9-b325fdf3d5bf/shark_rotator_powered_lift-away_speed_bagless_upright_vacuum_reviews.pdfIn PDF document text
    • http://litabasiker.onlinewebshop.net/livro_noes_de_administrao_pblica.pdfIn PDF document text
    • http://tibimixokafif.epizy.com/20912381395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c36054-f5a4-48a9-b4f4-8c23777638b8/kefoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1fa01a-4ec5-4ed0-84db-acafa9896a70/dd_4e_feats.pdfIn PDF document text
    • http://laxukumelukadut.myartsonline.com/lusibisarevudis.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_off000106f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F1 5044 bytes
SHA-256: 85036aa362d4dcc3418bf689462f75c2c06ef22ae2258d5dd970993a75aa5f2d
font_01_sfnt_off0001182f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182F 11980 bytes
SHA-256: 4700e759ffc93e9ed0d3ebc7ba428bc83451f0dd05ba93d0dae0ad1a93956a89
font_02_sfnt_off00014044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14044 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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