Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10f107a3baf4274…

MALICIOUS

PDF

80.4 KB Created: 2021-03-23 12:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 43bd5d64105bfc9851a2f1dfd6eb9847 SHA-1: 99fda2a3d2753fa5bc5ffdc0060de92083109c80 SHA-256: e10f107a3baf4274ff0bd05aa67f789dcec1ea2c79ef961c8808130e4f69ae0d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://xezojetit.ru/strik?utm_term=casio+g-shock+ga-1100-1a3er PDF link annotation
    • https://cdn.sqhk.co/jategesil/ohfhgu5/96250309607.pdfIn PDF document text
    • http://jakartapro.xyz/word_finder_game0ezbr.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/jbhdCTC/nisekadabe.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/GLPjhif/34056490314.pdfIn PDF document text
    • https://cdn.sqhk.co/fepefudasor/xT6haTz/weekend_us_futures.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/QNjhuUL/3541195803.pdfIn PDF document text
    • http://trenolgia.buzz/is_sio2_polar_covalentoqvkg.pdfIn PDF document text
    • http://masajsalonunuz.com/best_way_to_travel_from_london_to_portsmouth9s7t1.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/jijICgj/53959950413.pdfIn PDF document text
    • http://filemarker.store/rihanna_all_songs_free_mp3_downloadjv40u.pdfIn PDF document text
    • http://uscreditinquiry.info/lediramiximuz9t4d8.pdfIn PDF document text
    • http://teenagetutor.online/hit_a_glass_ceiling_def54b6h.pdfIn PDF document text
    • http://hydra.moscow/21885367678yyym3.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/gBS6icH/52975149146.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/77878a44-c128-4fd0-a115-d70d2b20d641/linksys_router_ea6500_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988de3b0-178e-4994-a442-7b8008b0e252/gezixevefijekamex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90395c90-1eef-4fcf-99fc-aa558d4e90da/kuzuxigezusafivomamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ce3aaa-048f-40ed-800b-f02425d407e0/what_does_margin_of_safety_in_business_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/500211e2-b44a-472e-b72d-a7c90c82607e/56330676830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2feed908-7bec-49a7-b119-9ad82acda96e/how_to_train_your_dragon_book_1_chapter_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62023d60-2f90-4a72-a226-bd0b1b6e8418/39781718382.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_off0000fc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5A 5388 bytes
SHA-256: 30abdb876fb714356d96d7f76d3d1eecb3b411395f5766c172a6c475308fa154
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 10492 bytes
SHA-256: 7e1e6f286dffab27b1d5e3cfeb9ab78c640535f2a5dc5d6a91c3936daf86dee0

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