Malicious PDF — malware analysis report

Static analysis result for SHA-256 291aae5479997e80…

MALICIOUS

PDF

72.9 KB Created: 2021-02-09 22:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 31f2688380818f25d9082e89f73f0a02 SHA-1: 9835fdb1b0186d760cafe9e15e24c6b3064dea2a SHA-256: 291aae5479997e808fd17be119f7f6fe89d5b5569dd37178e702e8ab72a3a843
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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/wb?keyword=acog%20guidelines%20for%20hyperthyroidism%20in%20pregnancy PDF link annotation
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/8c6345b7d7203df.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/pocket_door_frame_kit_home_depot47rvh.pdfIn PDF document text
    • https://cdn.sqhk.co/webaxepibi/e03ejiy/71062422727.pdfIn PDF document text
    • https://kipigifusulip.weebly.com/uploads/1/3/4/4/134437712/tirodi.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/OiCzicE/kits_para_dream_league_soccer_2020_psg.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/f85fdbda1b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fc62d52915e2.pdfIn PDF document text
    • http://kigurumi.org/universal_studios_hollywood_map_2013f996d.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/zofik_ruzakuso_libilapoti.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/nogofokumovari.pdfIn PDF document text
    • https://kilewesiviteki.weebly.com/uploads/1/3/1/1/131163613/jopemezugexame-rujuze-vugarogofufoxa-dikexed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_600bba7932035.pdfIn PDF document text
    • https://cdn.sqhk.co/xazewizol/o7iidrS/race_car_climb_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/jgjiggi/refimebumepawuwale.pdfIn PDF document text
    • https://jipunusib.weebly.com/uploads/1/3/0/8/130813609/7260078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 5660 bytes
SHA-256: 04b20eb5698aa6bbe899cba0475ba3be89aaf7b7fac672e1b8674cbe6e7d1c36
font_01_sfnt_off0000f3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D6 10160 bytes
SHA-256: f854816d633eb5bd4a82d7988e870788279e4469078097d33556316dc5219ee7

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