Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e09192dfe49a2d0…

MALICIOUS

PDF

76.3 KB Created: 2021-03-13 18:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 474c4a7e67614cbd28d28df707a95915 SHA-1: ca07c4a8beebba03b1e1da913f4e97608bb8f06b SHA-256: 6e09192dfe49a2d02c55a1e9889c7670a7ad285ec31ef33ee6658c80c1eda88e
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 0.9996

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://jacksth.ru/award?keyword=amtmannens+d%25C3%25B8tre+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5ffcdef2d4b6f.pdfIn PDF document text
    • https://senovaxevuka.weebly.com/uploads/1/3/5/3/135304629/bojutuj-bagivino-rijob-jaliv.pdfIn PDF document text
    • http://netowamuj.iblogger.org/process_flow_chart_template_word.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/JghhecN/france_top_scorer_2018_world_cup.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jjgfhiq/how_to_become_tour_guide_in_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/XLCIOii/tunawor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415526/normal_5fecca67182a7.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/what_does_a_velocity_time_graph_not_show.pdfIn PDF document text
    • https://cdn.sqhk.co/romemanir/gfZElkD/xewux.pdfIn PDF document text
    • https://cdn.sqhk.co/rokogikapo/ghhdPib/aaa_login_missouri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5ffbb3291e959.pdfIn PDF document text
    • http://dolinunuridaku.iblogger.org/mechanical_engineering_drawing_software_free.pdfIn PDF document text
    • https://ganakinupep.weebly.com/uploads/1/3/4/5/134599301/dozesijiluk_dukiwom_dezamisasomegu.pdfIn PDF document text
    • http://vebofituzor.iblogger.org/mavovituxakivige.pdfIn PDF document text
    • https://cdn.sqhk.co/merutigujet/hhhghPp/tik_tok_video_tinyjuke.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/iivhcjg/phoenix_theatres_main_gate_movies_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_6013dff666aac.pdfIn PDF document text
    • https://rokubupudila.weebly.com/uploads/1/3/1/8/131856034/nadaxoket.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/ehjibgj/township_game_helping_hand.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/jujugu-webis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vifowas.epizy.com/58853684429.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5284 bytes
SHA-256: b5359afce545b048e910b5ced781b62ea0d1998cec5671b323c72699a413d747
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 10968 bytes
SHA-256: 7792af01e33278ba5e6ea021361ad292ac70fedcad916138fe13fa00ef3b2c1d

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