Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a309df4dbeb26f…

MALICIOUS

PDF

77.3 KB Created: 2021-03-15 03:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4a979f6a90f577786d2848fe51ef5dbf SHA-1: 9a375d727af9e53f052c6437406264973d9f4903 SHA-256: f6a309df4dbeb26f6d5f6feb5fba1f181c8040d184dc0671be609796e6feaa9f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the heuristic indicating a link farm strongly suggest a phishing or malware distribution attempt.

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://gimoguvi.ru/wix?keyword=air-vac+pcbrm-12+manual PDF link annotation
    • http://nopezimugabotik.mygamesonline.org/blender_tutorial_download.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/45509971127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_60497e28eda38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5fe993cfa2679.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/the_birds_and_other_stories_daphne_du_maurier.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_60469ad196799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_602f2b27d7ce9.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/proctor_agnotology.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/69007784284.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/1132383557.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/21193598050.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/tatalaksana_anemia_defisiensi_besi_pada_ibu_hamil.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/pofakab.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/98764451688.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/0310645c-5582-4a3c-97bf-c241608177f0/best_cellular_trail_camera_on_the_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373da0eb-ee23-4b0b-bcbb-ae1c92630080/zogegopekuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0692c40b-e824-482c-aa2b-7ea58559f297/walmart_open_tomorrow_morning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f00a35-9c33-443e-a1b6-37bbb4c90d48/practically_cheating_statistics_handbook.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/80996053372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800621bc-ae38-4d0c-a725-5bb8c0bb4f71/vedic_astrology_zodiac_signs_and_dates.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/abnormal_psychology_kring.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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 5304 bytes
SHA-256: baf9d8611e47ed45e03f3f4da4b153cca4955c666d43221374cbaa064fbc12f9
font_01_sfnt_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 13004 bytes
SHA-256: 1e1a3f4d29937d9759234f7d12778f3f621dacc9ec81412f05c609c99eabc541

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