Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b459b263f13d8d…

MALICIOUS

PDF

85.3 KB Created: 2021-03-23 22:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9df9d545e88a6fe0a5b35e5e47055464 SHA-1: df74278882d1eec991ea074616ce6954b4881449 SHA-256: 00b459b263f13d8dc163111308a9d2235dc0fa1f901e86cc6f79546b49820476
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially untrustworthy hosting. The presence of external URIs suggests the document's primary purpose is to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • 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://nipisod.ru/strik?utm_term=craftsman+10+radial+arm+saw+model+113 PDF link annotation
    • http://riwotivadejud.sportsontheweb.net/agile_pm_handbook.pdfIn PDF document text
    • http://uscreditreport.info/328155809bgumy.pdfIn PDF document text
    • http://trickyturkey.com/crossfit_gymnastic_training_guide1atav.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/50684ab6400e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5ffc26da9d2f7.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/genie_keypad_compatible_with_liftmasterhte75.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/42593456676.pdfIn PDF document text
    • http://tadidavazutopa.sportsontheweb.net/aircraft_structures_for_engineering_students_4th_edition_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/jchi1ih/can_you_write_notes_on_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/xikotoxerov/MvaBpgh/meendum_amman_movie_songs.pdfIn PDF document text
    • https://zavegikow.weebly.com/uploads/1/3/4/8/134884987/vorowi.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/5279354.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/nafiximigijuzadi.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/37051049568.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/iRig3m8/lucid_adventure_idle_rpg_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_60217a938b6e9.pdfIn PDF document text
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/gidozuvuvedu.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/5369375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_6046b4fdbdd17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_6029ca10aeafa.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/gclwHgf/sewiwulor.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/what_are_the_primary_differences_between_tcp_and_udp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_5fe4479c7bbbd.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/noxasibesoxinuvelukizafu.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/sjjB1Cy/craigslist_los_angeles_apartments_by_owner.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://xipanizi.myartsonline.com/65896871773.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/79613236517.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/wurazusenowomifowozil.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_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 5312 bytes
SHA-256: b63815a4d549df00b04ee91495f1a2160e7681cd84dd65fd54b061e2d5292059
font_01_sfnt_off000112d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 11096 bytes
SHA-256: 45caab89038c6344bfc7cc1ad814f061c3f1a651d48fbea717e68bb9ebd976e6
font_02_sfnt_off000138d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176