Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44d75eceec6962f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-10 14:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5d95d59fdb13ae05b5b10db1c2a7ad8 SHA-1: 3a69c59b04028a29dad9c6b1895feea877b04715 SHA-256: e44d75eceec6962f2494192df6dedd7b9d763dedf2085a385f2ee735d90d7701
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wix?keyword=odyssey+book+5+summary PDF link annotation
    • https://topirameji.weebly.com/uploads/1/3/2/6/132682330/vozifal.pdfIn PDF document text
    • https://vijilipaguwojig.weebly.com/uploads/1/3/4/8/134872157/0ffc363097151e.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/how_to_rig_for_saltwater_pier_fishing.pdfIn PDF document text
    • https://cdn.sqhk.co/gixixutiji/XJhcZXa/fefekevuwatukuxizuzaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/gogamosujimi/wiaJ5jh/39681227201.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/jx8ELkp/2019_daytona_500_racing_reference.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/oxford_dictionary_full_version.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/how_to_determine_allowable_bending_stress.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/hj7oezJ/hoop_messenger_apk_mirror.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/YhgsigL/fibexiz.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/40397405218.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/gDnM5hi/olympics_2016_winners_list_in_marathi_language.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/XNSijiC/what_does_the_bible_symbolize_in_christianity.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/gLgHih2/x-_plore_file_manager_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/gchhbjh/muvoburisakorolepolegutij.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/xejoranilot_renixidobukabi_seporivo_neweki.pdfIn PDF document text
    • https://cdn.sqhk.co/simixejazir/Vvhhhcr/21362648536.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/pjdgjdO/bivalanokurav.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/jdhbjbz/43352538871.pdfIn PDF document text
    • https://mifimixaxenerut.weebly.com/uploads/1/3/3/9/133999571/zepimabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidugozu.atwebpages.com/ludab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fec87cc-cf49-499c-a8d6-3929154732b5/what_are_good_transition_words_for_essays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8507d8-b8bf-4890-9e5a-66be07f70a75/76076956170.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_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 5396 bytes
SHA-256: 273f303cb5e1bbfc5eee2c2fcdba923807d0f781513b426f3fc198e64bdc7304
font_01_sfnt_off0000fbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFB 10952 bytes
SHA-256: 8cb94be7c1e6451c8531df5fa3dd850d17f6ab539ce808c6b1e40acf903b90ae

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