Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e36249eae2640c5…

MALICIOUS

PDF

72.0 KB Created: 2021-02-11 16:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2a5ca5405833e62f062204746318eab4 SHA-1: cc51ae091bc233f502a36ea3dfd69839dd6a26d5 SHA-256: 7e36249eae2640c58485efbbc06ee5308738b64ff09fba942cee0762997d7bf0
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including being a redirector link and a link farm. The embedded URLs suggest an attempt to lure users to external sites, potentially for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm and redirector heuristics strongly suggests a malicious intent, possibly related to spearphishing attachments.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=as%20melhores%20de%20ataide%20e%20alexandre In PDF document text
    • https://cdn.sqhk.co/jimumakevaji/jitjf2e/16426647078.pdfIn PDF document text
    • http://sefajoga.iblogger.org/phirse_jab_baarish_hogi_song.pdfIn PDF document text
    • https://dosisusibifoba.weebly.com/uploads/1/3/4/2/134236234/6183528.pdfIn PDF document text
    • https://zajedipadere.weebly.com/uploads/1/3/1/3/131398131/4572973.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/e9vjjgf/ben_10_alien_swarm_1080p_izle.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/uiiSjdV/helicopter_flight_simulator_games_free_download.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/9830519.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/matorurul.pdfIn PDF document text
    • https://kukitame.weebly.com/uploads/1/3/1/3/131379641/bb517e1427.pdfIn PDF document text
    • http://zokasup.22web.org/mv_btob_beautiful_pain_720p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_5fe92b3772e5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5fecaef948844.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/IxcaWgf/ssc_vacancy_calendar_2020.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/3964090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukazuvogupe.epizy.com/morality_definition_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/53170942414.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/school_transfer_certificate_application_format_for_tc.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/agreement_format_in_malayalam.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_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 5124 bytes
SHA-256: 27fcc955c106058d6365166c3a88c69b090a6a366768fdeddf3beb97dc0b107c
font_01_sfnt_off0000ee77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 11196 bytes
SHA-256: 2de121eb4144ff6f9e971a6982a5832b70f4f4f2200f901ad32726ae4edcdb34

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