Malicious PDF — malware analysis report

Static analysis result for SHA-256 31fc7b0292587500…

MALICIOUS

PDF

74.4 KB Created: 2021-03-31 00:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 533e6cc7e24edee7d8d7c52c68423115 SHA-1: ecb34a0a10d0399eb179e5c043238b45aaf54415 SHA-256: 31fc7b0292587500e5cb1d36deb9bd8ff2993c19be73cb5cea2cddd171ad1405
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple engines, including ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior. While no scripts were explicitly extracted, the presence of many external URIs suggests an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=how+to+begin+martial+arts+training PDF link annotation
    • https://cdn.sqhk.co/simizekovogi/heLzjgK/city_by_the_sea_movie_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/pfhib3b/magic_knight_rayearth_song.pdfIn PDF document text
    • http://gigusopubevese.22web.org/caedmon_s_hymn.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/80877044406.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/ibzgejj/piano_keyboard_black_friday_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/SAS9icP/z_nation_cast_season_5_episode_9.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/YicFAgD/femajebupi.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/63739431910.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/ninujiguvezefebakedagi.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/iaVWphC/mezizutuposoviku.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/g7jdiao/you_already_know_tik_tok_song.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/415d0503-d537-4ae9-98fc-3abbec65afaa/garirazawozejakaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96554526-696d-4a97-aa05-5cb85c7e8120/nixawaduzujesemimi.pdfIn PDF document text
    • http://wodelotozajuta.rf.gd/process_dynamics_and_control_2nd_edition_solution_manual_chapter_1.pdfIn PDF document text
    • http://dosumomerotep.rf.gd/the_essential_theatre_11th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1b36a4-fed7-4283-b115-5992b0deb2d5/pojozatesinixesis.pdfIn PDF document text
    • http://manovubiludigi.rf.gd/paint_sprayer_rental_merced.pdfIn PDF document text
    • http://natexekazedap.epizy.com/granny_mod_menu_apk_new_version.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/extraordinary_popular_delusions_and_the_madness_of_crowds_sparknotes.pdfIn PDF document text
    • http://moxapowi.myartsonline.com/bosch_silence_plus_46_dba_reviews.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/25863407657.pdfIn PDF document text
    • http://sapovupiz.rf.gd/22145729460.pdfIn PDF document text
    • http://xavituzupitojo.epizy.com/hamlet_penguin_readers_level_3.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_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 5200 bytes
SHA-256: 2af41de3fe6325a328157a55dc2333e20a8830361791a86faa8f5daea459196c
font_01_sfnt_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 10564 bytes
SHA-256: be126cbf506ca9f2b86d132dfbbd2d17008ca5676a74bb000012ec700399c231

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