Malicious PDF — malware analysis report

Static analysis result for SHA-256 70405f489c9c3baa…

MALICIOUS

PDF

73.0 KB Created: 2021-03-30 00:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3d8acf8513f313b31f448e65e1c387a6 SHA-1: 365ac630f4e9e960d3008352af080e9af0cacbe2 SHA-256: 70405f489c9c3baa04021eefa90488ae08ba7c33b055bee8d0bec2be862ad2d3
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=filmywap+punjabi+movies+free++2018 PDF link annotation
    • https://cdn.sqhk.co/melipetoluf/fiehiQ5/juegos_de_bounzy_2_y8.pdfIn PDF document text
    • https://witatubaf.weebly.com/uploads/1/3/1/6/131606367/09d9cf133cd2b91.pdfIn PDF document text
    • http://lozhobelir.space/kindergarten_math_worksheets_color_by_numberpioz3.pdfIn PDF document text
    • https://cdn.sqhk.co/juvekuvop/EgdhaUr/snake_zone_io_game_video.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/hijFggo/ping_pong_trick_shots_dude_perfect.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/aXGhjdy/mini_soccer_mobile.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/bokuzem.pdfIn PDF document text
    • http://gazopulodagifus.iblogger.org/dogirov.pdfIn PDF document text
    • http://spindlndou.space/erector_spinae_plane_block_cpt_codesztxz.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/4719000.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelezinofa/BibYjdq/luzadewojuvobupirotex.pdfIn PDF document text
    • https://mosajobobidi.weebly.com/uploads/1/3/4/7/134726535/raxobosef.pdfIn PDF document text
    • https://cdn.sqhk.co/wemulekojex/dygdibN/wanere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gudukupir/creature_3d_hd_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/baby_girl_clothing_9-12_months.pdfIn PDF document text
    • http://kevatudoritek.rf.gd/eclipse_for_java_64_bit_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/40332999376.pdfIn PDF document text
    • http://tibojerevaf.rf.gd/jackson_analytical_methods_for_lawyers.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/85210479940.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/sirotiketik.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/asus_rt_n12d1_reset_button.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_off0000dfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 5992 bytes
SHA-256: ec38d71564fc8a6d55b512e41c9d359385298f63b817c3d71e4800e0a96157c6
font_01_sfnt_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 10256 bytes
SHA-256: 1075cb4049362413c3eb0db0ef0ec5069f1ec165c497c9eded2b4092978ce67b

Open this report in the interactive analyzer, or submit your own file for analysis.