Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce240f9efe729076…

MALICIOUS

PDF

77.2 KB Created: 2021-01-06 00:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d2363e1c62cd72a010b3856913f6b00f SHA-1: c086052f4d72942acf0e2fea3e3514d18f46abf6 SHA-256: ce240f9efe7290764a0fc5919df56fcf9c244dfd463665e4ceddd8da840a55d7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to manipulate search engine results or distribute further malicious content. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=150+inch+projector+screen+dimensions PDF link annotation
    • https://cdn.sqhk.co/kafekata/gjgieKL/kinosagonuzutawugalirek.pdfIn PDF document text
    • https://rurawovupotoli.weebly.com/uploads/1/3/4/0/134017211/dojolirusogizomaful.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/20d32c1fe.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/6e253.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/ripelafud-gofujujafuvu.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/wasonoruxo.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/eiehjwQ/gutinidimujabepitow.pdfIn PDF document text
    • https://lorotemorotur.weebly.com/uploads/1/3/4/6/134649447/7535019.pdfIn PDF document text
    • https://pazomanu.weebly.com/uploads/1/3/1/0/131069777/tunojokebikob_pebix_zulivivezixita_borabe.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/muwemivumazulax/gst_annual_return.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13899856-ecc4-48bf-8ee4-07354301834e/bulur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8867848-17a1-4f2e-97ad-bfd1a611a402/best_dual_monitor_stand_for_27_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/dynamics_365_crm_reports.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_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 5372 bytes
SHA-256: 207becc61a1bb5c27004f6fb90ecfbca01e6eb3582cd74c2a541842de2ec6d45
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 11104 bytes
SHA-256: 07a593206abd63ed3aa17844ef86cc1aefdb0ad7a04c2d62abf55b631693d2ca

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