Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff66e0b504df007…

MALICIOUS

PDF

80.4 KB Created: 2021-03-23 23:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bd62b0a6239b984e46a51ee7fa1f4d10 SHA-1: 763b1ef439d14d8274fac28fb5a593bbf1de9468 SHA-256: dff66e0b504df007df0fa73d1d31880bc7b007d4aff664b063253bb7576ae754
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one specifically noted as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the document's primary function is to host and distribute links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://jottigo.ru/123?utm_term=100+square+football+pool+template PDF link annotation
    • https://sagurofabe.weebly.com/uploads/1/3/4/6/134686650/sudoxenedo.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/love_story_chords_no_capo.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/gifhejf/cute_animal_pictures_desktop_backgrounds.pdfIn PDF document text
    • http://baturoguvumoviz.22web.org/los_30_derechos_humanos_universales_onu.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/heVjaRc/northern_tale_4_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/bmjeid5/walkthrough_for_adopt_me_and_tricks_2020.pdfIn PDF document text
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/9902573.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/hdhMgh3/xepor.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/p5jfYig/minecraft_pe_flat_village_seed_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/ePoWica/pyramid_solitaire_saga_card_game.pdfIn PDF document text
    • https://ligenoleka.weebly.com/uploads/1/3/4/4/134496601/vefuxizelitoziboxa.pdfIn PDF document text
    • https://cdn.sqhk.co/dosoxupivaka/3hhfYWO/manik_2005_bengali_full_movie_free.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/magedupavonoduduzifidazep.pdfIn PDF document text
    • http://kuwixuxukaf.iblogger.org/rijopabidisazitewib.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/026ba6951.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/95083916226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b42494-452f-4cc5-991c-335c0f9c6b5c/what_flower_represents_my_name.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/guwivuvesonebusefufudab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12af58c-1ee7-430a-a5e1-f3194b705268/common_core_ela_language_standards_grade_4.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/tewojanalebekilesakixatef.pdfIn PDF document text
    • http://gorenamuzenek.rf.gd/how_to_buy_ventless_gas_logs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a523301b-cffe-403b-8075-e8f47a5ea1fd/33978506391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1953b75-aaea-41b3-962d-1831528a33ba/bopadipudixusej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56151210-ab10-4409-9565-ed9dac938415/vox_valvetronix_tonelab_st_review.pdfIn PDF document text
    • http://xafupovavosife.rf.gd/how_to_reset_netgear_wnr2000v5.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/lagu_dj_asmara_ines.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_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 5412 bytes
SHA-256: 365876e0ef75d5d01a739e896ac34706b4a70a0058e470a84185401b8578c638
font_01_sfnt_off00010f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7D 10580 bytes
SHA-256: c7bd35adcb1e637af03d00f439a76a22fb37d1ba1e39a6faf05c00683d187085