Malicious PDF — malware analysis report

Static analysis result for SHA-256 c846af9267a46c4c…

MALICIOUS

PDF

79.4 KB Created: 2021-02-04 09:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 182286f08b91a8e3b41763c66602545b SHA-1: 38b70f1da7dc4642dcd62c62931eddee3c46ccc9 SHA-256: c846af9267a46c4c34e6748a5b6770b6678f0b594dbc6483b25692d46ab4b2e7
126 Risk Score

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 used to redirect users to malicious sites. The document body, though heavily obfuscated, suggests a lure related to 'Busted Netflix ep 5', indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=busted+netflix+ep+5 PDF link annotation
    • https://cdn.sqhk.co/xutujipux/gfxSjjj/45598932194.pdfIn PDF document text
    • http://yogait.space/find_the_murderer_online_gamekrvo0.pdfIn PDF document text
    • http://halfraire.xyz/adamantine_armor_5e_ack0zb4.pdfIn PDF document text
    • http://jobs-ingenieur.best/93634717453le9id.pdfIn PDF document text
    • http://anyita.space/cp_plus_dvr_firmware_updatefjr6s.pdfIn PDF document text
    • http://myfavoritesun.xyz/gekasomirekosottvntc.pdfIn PDF document text
    • http://vekvelo.ru/nujosotodavuxuraduk9gyg.pdfIn PDF document text
    • http://halfraire.xyz/lebasifenanemuzog3tdtw.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/604663588128w3wg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412396/normal_5fcc6fb2ddfd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5fd1aadd17af4.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/fb2ihjh/gacha_life_2_download_app_store.pdfIn PDF document text
    • http://fortuneo.biz/bapemobezokpniv8.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/idghbPh/fitbit_versa_3_vs_sense_comparison.pdfIn PDF document text
    • http://fdvsefwfrw.space/ejercicios_punto_muerto_resueltos0lq6q.pdfIn PDF document text
    • http://igcopyrightclient.com/surah_al_waqiah_banglajqq8q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimemotom.rf.gd/42563686089.pdfIn PDF document text
    • http://vudagolefedofa.epizy.com/board_discussion_paper_template.pdfIn PDF document text
    • http://wadexabosuzim.epizy.com/calendario_2019_escolar_2020_sep.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_off0000e892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE892 3976 bytes
SHA-256: 59e0d639922bade4a860cd8f6d6e6cd4368d89c3503f5192e918da7b9bfb047c
font_01_sfnt_off0000f6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D4 4968 bytes
SHA-256: f949d352f45698d2c3743f7868fd87200e8c3d603bf0dc4304f33fd1cb410f0d
font_02_sfnt_off000107e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 11420 bytes
SHA-256: 7e297baba2cfdbdeabe17a11169e89d7536ff941fa2f67dde95888b4078016c4

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