Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f776532642c58cb…

MALICIOUS

PDF

91.5 KB Created: 2021-02-28 13:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 092ca5a08f8a2a42c3e6c9e3721370b7 SHA-1: 37185ee51317b01a325e52675434e995b6704c77 SHA-256: 2f776532642c58cb023f1c1ad0656f6c68ddecacf38a96fa7a6c5a2748489c3a
184 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, indicating a link farm or SEO spamming operation. The primary external URI points to a URL that mimics a common technical support query, likely intended to trick users into clicking through to a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

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 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
  • 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://bologen.ru/award?keyword=why+won%2527t+my+logitech+wireless+headset+work PDF link annotation
    • https://cdn.sqhk.co/nozedimasav/ibQNifB/midugixofugutagugaxiw.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/cvcchcL/toca_kitchen_2_online_unblocked.pdfIn PDF document text
    • http://jijufik.22web.org/salary_of_financial_analyst_in_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/ggghgec/granny_smith_apple_tree_bunnings.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/biblia_reina_valera_1960_descargar_gratis_en_espaol_audio.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/dfeed5387e9c619.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/gegfihP/girl_wallpaper_hd_pinterest.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/mfhfCIm/ludo_3d_multiplayer_game_video.pdfIn PDF document text
    • http://sexapixir.22web.org/ethylene_glycol_production_flowsheet.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/jumulisikut.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/gcXSgjH/romantic_stories_in_english_to_read_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/jjRhaHg/darkness_and_flame_4_walkthrough_part_2.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/zesotat/757601380.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/younow_apk_mod.pdfIn PDF document text
    • http://davivizuvazofa.rf.gd/manualidades_reciclaje_con_botellas_paso_a_paso.pdfIn PDF document text
    • http://lebodevafetag.epizy.com/delegation_process_in_an_organization.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/craftsman_garage_door_opener_keypad_not_working.pdfIn 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_off00013bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEA 5656 bytes
SHA-256: 307a0afddfef1dff21530ed05a9c554e81aa4c5a0b99519ccddd584bb25a6475
font_01_sfnt_off00014f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2A 11088 bytes
SHA-256: 67e7450260485dc062fb799e0a8dbcd2af6d48824e00fb52eca492a40e693e80

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