Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc00d642df50631…

MALICIOUS

PDF

74.9 KB Created: 2021-03-08 14:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d51bcddbfee9ce25d085bc4665f84de2 SHA-1: 9e8aa1d5a94627431094fe21c0bbbb6eb473776d SHA-256: 3dc00d642df506318a1ced202b3b48b980c748a3e4b99277ab73f0cc6df8c28e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to exploit kits or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://golowaki.ru/award?keyword=dependent+clause+examples+pdf PDF link annotation
    • http://lasns.fun/44045846436dy14d.pdfIn PDF document text
    • http://beautysss.site/baby_girl_names_starting_with_s_marathikkfuk.pdfIn PDF document text
    • http://tameeniraq.com/muzarozaritiwawukidepids7u2a.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/rhiCzie/ahlan_wa_sahlan_marhaba_meaning_in_urdu.pdfIn PDF document text
    • http://riragukigud.scienceontheweb.net/38596035453.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/iVzjhWh/nobemilofikigamutosigod.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/ggECja5/ninety_six_sc_weather_radar.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/81428467062.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/gwMqc5u/neo_geo_mvs_games_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/aWjdhjS/heroic_magic_duel_mod_apk_2._1._21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_6039086e5fc1c.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/idJghif/17284972924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_601636c0ceeb3.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/gf4ihje/penebimuwom.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/4jbXqha/35715658828.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/Z6UWgcd/princess_cruises_medallionclass_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/KqM5ujd/nerusuvox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5fce8e35ceb66.pdfIn PDF document text
    • https://cdn.sqhk.co/naxaroja/66ihMd5/mint_launcher_apk_2020.pdfIn PDF document text
    • http://unityfree.xyz/cooking_with_herbs_and_spicesqvk68.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/WjhqQii/nowojobiniwowis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369149/normal_60039099b5d16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488837/normal_6045ebcc89468.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/idughie/dog_hair_salon_near_me.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/the_man_in_the_high_castle_season_2_episode_10_reddit.pdfIn PDF document text
    • http://coloradocustomelectric.com/fill_in_d_d_5e_character_sheet8dm1z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 5272 bytes
SHA-256: 84d7ddc88fce4d9f8512777225656cd104d7fec406328a08bb4d46c38d6a0c76
font_01_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 10388 bytes
SHA-256: d77341dabda153e32bccb062b4e01b4cc8a6883dc835a7e925d2fb238253d5c7

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