Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e3b61a17685c50…

MALICIOUS

PDF

77.1 KB Created: 2021-03-27 09:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1be003147c0c1603892f6eca2dbc2657 SHA-1: 44e0369ef35fba53a2c0beb3d2bae605202f95e4 SHA-256: 55e3b61a17685c50f527de0a81d59a6b370000f6ab562b48a42e6e40274986b3
186 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 or link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to a game mod, suggesting a lure to trick users into visiting malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://botokaw.ru/wix?keyword=crash+arena+turbo+stars+mod+apk+2.19.3 PDF link annotation
    • https://cdn.sqhk.co/zapimafe/hW0kgeh/magic_tiles_3_download_ios.pdfIn PDF document text
    • http://redit.fun/popular_ballads_of_the_60sd3p92.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/f2875d6a.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/BsieTic/best_trucker_lite_unlimited_money_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/Jggbtgd/digestive_system_facts_and_functions.pdfIn PDF document text
    • https://cdn.sqhk.co/rujojumex/cC9OsjG/hideous_laughter_pathfinder_2e.pdfIn PDF document text
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/5521973.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/a81gfgf/nuxedoxido.pdfIn PDF document text
    • https://cdn.sqhk.co/majukedow/phRW4rs/52856917595.pdfIn PDF document text
    • http://supernefritroller.xyz/zowerraw5o.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/e6jdVig/japedumibi.pdfIn PDF document text
    • http://wujejejifi.mygamesonline.org/how_do_u_play_cards_against_humanity_on_zoom.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/nc_youth_employment_certificate.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/zibejadadobexaxel3iur.pdfIn PDF document text
    • http://reawont.online/spoken_hindi_books_free_downloadoilpj.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/ge24u5W/like_a_boss_movie_2020_rating.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/midupazasokaxamudigamux.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/97339570498.pdfIn PDF document text
    • http://milanbeach.fun/petsafe_collar_battery_near_mewq8b3.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/ijHEhde/nubexurarenovagor.pdfIn PDF document text
    • https://gepajalubawif.weebly.com/uploads/1/3/5/3/135326746/kolupuxuxedapuripub.pdfIn PDF document text
    • https://wupasatotoke.weebly.com/uploads/1/3/4/6/134602231/wixepeki.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/pukaridimupo/69374804536.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/luwudaw.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/ecology_and_environment_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/fiditafe.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/baker_house_alvar_aalto.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_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 5812 bytes
SHA-256: 5cb3a9438487e4c52f5464227d980db6f291c6a2700ae71db1d5623e4ec45d96
font_01_sfnt_off0001040f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040F 10540 bytes
SHA-256: a58d970a9bdcf171edacec0b56b5a321223794aa4f9c651464e6281465767498