Malicious PDF — malware analysis report

Static analysis result for SHA-256 902f6a24282ca0a5…

MALICIOUS

PDF

88.5 KB Created: 2021-03-05 19:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fbfb56bda023284d4d5c1fa45e982542 SHA-1: 42ebe4372291b78f4760b79701da44b836e42069 SHA-256: 902f6a24282ca0a5cdfa076bed16166b660ddb9b3ec815f6953e3e87a628c502
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains numerous external URIs, with a prominent one being 'https://xajibur.ru/wix?keyword=fossil+creek+hike', suggesting a lure to a potentially malicious website. The document body, though heavily obfuscated, contains metadata related to 'Fossil creek hike' and the wkhtmltopdf application, reinforcing the lure. No scripts were extracted, but the overall structure and external links point towards a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xajibur.ru/wix?keyword=fossil+creek+hike PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392652/normal_5fdb7434c0ab1.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/77344872285srpkm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450434/normal_5feed8d0d02ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fe8e5b6c191c.pdfIn PDF document text
    • http://teenagetutor.online/bob_evans_lunch_menu_prices9wi85.pdfIn PDF document text
    • http://tohld.in/fuximofejabork2bxx.pdfIn PDF document text
    • http://copyrightprivacy.site/lisodifilldh3.pdfIn PDF document text
    • http://salleapp.xyz/how_to_draw_hair_for_beginners_easy_girleitkv.pdfIn PDF document text
    • http://1xbet-registr.site/cementerio_de_animales_stephen_kingb636j.pdfIn PDF document text
    • http://vonowaz.iblogger.org/dodukirolutufewowos.pdfIn PDF document text
    • http://voiprormul.xyz/cfmeu_calendar_2018_vic3q8p5.pdfIn PDF document text
    • http://puwobero.22web.org/naruto_shippuden_mod_apk_2018.pdfIn PDF document text
    • http://ewop.space/pathfinder_kingmaker_tristan_cleric4zcpq.pdfIn PDF document text
    • http://meriline.store/the_coldest_city_in_the_world8z7z2.pdfIn PDF document text
    • http://blancop.xyz/jamman_solo_xt_owners_manuallv6jw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_601fbae307ac4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/kydex_sheet_suppliers_australia.pdfIn PDF document text
    • http://dixisafujanen.rf.gd/28560871978.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/gojuvaxurukukuseruwawo.pdfIn PDF document text
    • http://tanozetodane.rf.gd/63806696732.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/bomovaruda.pdfIn PDF document text
    • http://vuxonisozezuxov.rf.gd/esl_literacy_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/blackberry_ringtones_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/4756478761.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 4300 bytes
SHA-256: 5bcb603dfb6dea8875ee89267a9a5774f718e9182773248a28df5bea595cbef3
font_01_sfnt_off00011713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11713 15232 bytes
SHA-256: 29ca6b25b5015c73a0e5b4965185d93a0ec7585e77d8bd775f6a7a74aed68e3d
font_02_sfnt_off00014635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14635 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3