Malicious PDF — malware analysis report

Static analysis result for SHA-256 3792bf0d73d839c8…

MALICIOUS

PDF

88.4 KB Created: 2021-03-12 01:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 129973f74418d656b4155d78ee27d78d SHA-1: 93107b5171f4cadc2a47a22a46d3a6961ad5af0e SHA-256: 3792bf0d73d839c89a18bed3b4740f01ae45a47674fec576fc841963a0742742
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 0.9996

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://kuzutuzo.ru/wix?keyword=knights+of+pen+and+paper+2+achievement+guide PDF link annotation
    • https://cdn.sqhk.co/gafisasiwu/hcjeq5O/99264164797.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/86948303505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fe5b297bd3c7.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/kugis.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/what_is_simple_keywords.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/xawoxugofifafejemat.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/9394850633.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/29901816933.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/1gfdjbL/randal_s_monday_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461249/normal_5fc99435c89ee.pdfIn PDF document text
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/wajivovemofelazejen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fd2bfec34fb4.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/bafazer.pdfIn PDF document text
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/nevezemas.pdfIn PDF document text
    • https://lapolepep.weebly.com/uploads/1/3/1/4/131406498/vezupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiriburud.rf.gd/vocational_guidance_theories.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/expanded_accounting_equation.pdfIn PDF document text
    • http://bibuxidon.rf.gd/beechcraft_bonanza_35_maintenance_manual.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/cobra_19_ultra_iii_microphone.pdfIn PDF document text
    • http://lobulowigewimu.epizy.com/46389738514.pdfIn PDF document text
    • http://datasixiva.epizy.com/75169092714.pdfIn PDF document text
    • http://poburukexefisit.rf.gd/algebra_worksheets_year_10.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFE 5700 bytes
SHA-256: 5e0d5ff9d4fee947332a116d64cd453193dde57ef9493521ebc8ecb0733363f1
font_01_sfnt_off0001304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304F 10472 bytes
SHA-256: 8329a707fb0b53b02164c9abd0e458fe0e51dfc72ea8a12790588a14f2ea7ffe

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