Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc800984a91a040b…

MALICIOUS

PDF

116.5 KB Created: 2021-03-01 10:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 596850ac6cf1f8007719f919da837035 SHA-1: 9cd1b6e916552892cafa2e5106b1d49f8c669dbb SHA-256: cc800984a91a040b1231c9418db88b7c0b03e97112c0213be119faed4962eb98
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://vilenefex.ru/aws?utm_term=how+to+find+primary+current+of+transformer PDF link annotation
    • https://sokarapojuler.weebly.com/uploads/1/3/1/1/131163736/tunigerurusewiw_korafibizexedaz_boziwubured_nuxigukok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_6031ec530a63d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458631/normal_6004ba28a4d15.pdfIn PDF document text
    • http://pornbustyvids.com/remasaduvolasegomuxedar9ecj.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/who_supported_johnsons_reconstruction_plan.pdfIn PDF document text
    • https://sopogokatoluj.weebly.com/uploads/1/3/1/0/131071191/zumifefovul-mitadujow-jedixapow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417321/normal_5fe29a4d7417f.pdfIn PDF document text
    • https://zunukewonodej.weebly.com/uploads/1/3/1/4/131453615/3a296df98c68.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/ikxPeif/stay_alive_reprise_hamilton_karaoke.pdfIn PDF document text
    • http://harkateine.fun/bunafusijumufigowota62fbk.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/cant_help_falling_in_love_piano_chords_elvis_presley.pdfIn PDF document text
    • http://litazil.22web.org/petsafe_invisible_fence_training_instructions.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/will_there_be_a_season_2_of_the_night_manager.pdfIn PDF document text
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/notakizif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5fcae9981ac55.pdfIn PDF document text
    • http://milanomoda-italy.website/switch_ingrid_law6v3cz.pdfIn PDF document text
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/pevuzuzonuluvo.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/does_1_rep_max_build_muscle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gejevebo.epizy.com/30193394142.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/nonparametric_statistical_inference_fifth_edition.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_off0001885e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1885E 5424 bytes
SHA-256: cd32540201859927dccc422771c285c5da39c63eb546c8cc5abea622b6b4e383
font_01_sfnt_off00019ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AD2 12144 bytes
SHA-256: 71fd4de4b9869bd1879ca703e4246b648a631b654621dcbcec53b32ea18396b8

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