Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4798278a2978628…

MALICIOUS

PDF

100.3 KB Created: 2021-03-20 09:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b7e98b21bc7070dbbf8eb71e03013fdc SHA-1: 2518d4548ea933acf4f8fe1f011d35be28e08057 SHA-256: e4798278a2978628602ab4776687d1637121c9ff6ee4a6cea71b6efa81514b3f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/strik?utm_term=what+is+the+story+behind+50+shades+of+grey PDF link annotation
    • http://giocodigital.space/attack_on_titan_season_3_part_2_name6eda9.pdfIn PDF document text
    • https://cdn.sqhk.co/zutigaku/iihFjev/edible_valentine_cake_toppers_coles.pdfIn PDF document text
    • http://zizuvajutenuvun.22web.org/331553005.pdfIn PDF document text
    • http://llloooodddd.space/zamafuzubijijutabiwancn5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5fd93c4b461f6.pdfIn PDF document text
    • http://kipukosolenures.22web.org/romuzidulaburilofiwotate.pdfIn PDF document text
    • http://xodokevazijif.22web.org/power_of_information_technology_department.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5fddb0c197b77.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/1qTicia/68892639819.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/dhhPreb/12917234874.pdfIn PDF document text
    • https://cdn.sqhk.co/tumotiwo/3oqgjWQ/barbie_dreamhouse_adventures_mod_apk_new_version.pdfIn PDF document text
    • http://gachihyper.xyz/38574948432o2sko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408463/normal_5fc998c278852.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/qP9jdic/vomulesinuxoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/iesd8gg/directv_app_for_apple_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/drijXgg/90219911070.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/jhhgiaa/toca_life_neighborhood.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444655/normal_603eb652909a3.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://rojajep.epizy.com/62165806133.pdfIn PDF document text
    • http://nijopupeboxisa.epizy.com/shola_aur_shabnam_video_song_pagalworld.pdfIn PDF document text
    • http://gizamir.epizy.com/38405877301.pdfIn PDF document text
    • http://fadakivok.rf.gd/3963140388.pdfIn PDF document text
    • http://mepudizik.rf.gd/what_does_the_book_of_enoch_tell_us.pdfIn PDF document text
    • http://rimutapewite.rf.gd/corporate_email_signature_template_free.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_off00013c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1C 5444 bytes
SHA-256: c7272c106670f6d44fb6f8e609569fcc072e07c0c23124796823adb639d401b6
font_01_sfnt_off00014ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA5 11544 bytes
SHA-256: eaec22b126653fea8ac3e4bb9f2a0447a84c3a0018a2f6cba73330d649a89e52
font_02_sfnt_off0001756b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1756B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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