Malicious PDF — malware analysis report

Static analysis result for SHA-256 100a76611792ecfc…

MALICIOUS

PDF

80.8 KB Created: 2021-04-08 06:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e86609f65666035499b38fb6b794961f SHA-1: 9e23a48a3a6e6488c31c521acd6631a238ec6a03 SHA-256: 100a76611792ecfc7649a25faf9340f7831f3a4d487d8385a22464426ea72167
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=beclomethasone%252F+formoterol+vs+budesonide%252F+formoterol PDF link annotation
    • https://cdn.sqhk.co/savaketiju/Fhi2ibT/tikajow.pdfIn PDF document text
    • http://legendnat.space/33321968602zr4sv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425929/normal_5fc775d409096.pdfIn PDF document text
    • https://cdn.sqhk.co/mewedenemez/ijdqjHN/degopanawuziro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_6010110f6916e.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/evolution_of_coelom_in_annelida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_606e44f8be656.pdfIn PDF document text
    • https://cdn.sqhk.co/suwaxixadut/nQTIjjC/auld_lang_syne_piano_easy_sheet_music.pdfIn PDF document text
    • http://zavupefedeba.22web.org/automated_guided_vehicle_system_agvs.pdfIn PDF document text
    • http://teksalle.xyz/what_are_some_examples_of_organizational_cultureb06im.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tatasuvuputo.epizy.com/anne_of_green_avonlea.pdfIn PDF document text
    • http://ziwebizivag.epizy.com/22945493280.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/23839288917.pdfIn PDF document text
    • http://lazubag.epizy.com/40025831462.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/zunivoteputijoto.pdfIn PDF document text
    • http://naremijex.epizy.com/lewizivifekozaliniladi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 5548 bytes
SHA-256: 986f02b74db478c601e82e58e013fd68e5dbce1918ac06735feb9b156760d992
font_01_sfnt_off0000f8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F8 11500 bytes
SHA-256: a459945b84bef79b943c5e42049b0a8436771ea85be410223f127622b5e8d8b8
font_02_sfnt_off00012070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 16160 bytes
SHA-256: 71965a19a7f9335088809374b0d641e6d4a160bd395340b351c68b22b5e6656e

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