Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d0e45f66b31374…

MALICIOUS

PDF

77.9 KB Created: 2021-05-31 21:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a9f329f2093d47b9ee05d054eb11c2d4 SHA-1: 5e0a5360f4054cf4387e777d2fed910b24a717c1 SHA-256: 60d0e45f66b313748abd2729acd328ee7a63a4959cb61b963cee281e63179e4c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is used to host and redirect to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nipisod.ru/123?utm_term=corrugated+sheet+weight+calculator PDF link annotation
    • https://rulusekiraz.weebly.com/uploads/1/3/5/3/135322703/841177a9676febd.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/kimotowigapug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_6038b3b4d00b6.pdfIn PDF document text
    • https://fofawuparojimi.weebly.com/uploads/1/3/1/0/131070926/jamomugideneruto.pdfIn PDF document text
    • https://wurokilusonopos.weebly.com/uploads/1/3/5/3/135345649/dumipiwulinosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408989/normal_600521ffe80c4.pdfIn PDF document text
    • https://jesidovelagira.weebly.com/uploads/1/3/4/7/134705211/kuden_puxutigulir_setug_biwuwuse.pdfIn PDF document text
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/gojegozof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_60417eec29620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_6056f82a49386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_604056986f94a.pdfIn PDF document text
    • https://rawixokuboja.weebly.com/uploads/1/3/4/0/134097397/79d7fd524b5.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/dosuzetow-tekew-ladopurigepison-fozowenudud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/best_ps1_emulator_for_windows_10_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b614ca12-97c5-45df-bc8e-9fea179bae20/what_was_the_main_purpose_of_the_berlin_conference_of_1884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/994cf9c9-24fd-4676-94b4-c693a7d0a926/21506046045.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/w/file/fetch/144423396/29694061926.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144416892/adanga_maru_tamil_movie_download_tamilgun_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5991b1-13ac-4490-b3c0-a4a658f4927c/famufofadatat.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/rabugesedumekexawuna.pdfIn PDF document text
    • http://mituxap.pbworks.com/w/file/fetch/144424008/food_dudes_catering_menu.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144412470/6133062657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8233ea-472b-4953-96e4-99561441a745/bloody_roar_2_free_download_for_pc_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d793f88-9827-4906-9fb5-04ebb528d2e1/91766123379.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/avondale_elementary_school_auburn_hills_mi.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/47925387742.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_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 5200 bytes
SHA-256: d77221bcb630c31edb7362b49544e2ad613f4e964e133f2ec2a207c2dbf82e55
font_01_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 11180 bytes
SHA-256: 316f09d46ea8b09bc22c5e1cc4012359a7a55f673269de8c68d7336da9b0e889

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