Malicious PDF — malware analysis report

Static analysis result for SHA-256 025fc5fb56d25a14…

MALICIOUS

PDF

71.6 KB Created: 2021-02-09 04:31:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2e489aa286ce7f192928ab06d866778c SHA-1: 3783d5b4202e6a2a436a7a75eb55179657540e2c SHA-256: 025fc5fb56d25a1492e0832bdedcb3aa382cc337f419fab7b5880da5de31fb2c
254 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=spring%20boot%20jdbctemplate%20postgresql In PDF document text
    • http://thailandlove.site/the_vikings_series_season_34emmn.pdfIn PDF document text
    • https://bogagabav.weebly.com/uploads/1/3/5/3/135305267/lafabegoxetewawiwoni.pdfIn PDF document text
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/7c7ec694addb5.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/jukasasasulazeguxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5fd13b620dfbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474736/normal_601054ef65213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_6020612ed1d9a.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/fifuto/bhagwat_bhagwan_ki_aarti.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/envision_integrated_mathematics_2_answers.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/47077363191.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/wuminupubetixe.pdfIn PDF document text
    • http://sojefebil.rf.gd/66555608584.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/sheet_metal_thickness_gauge_chart_in_millimeters.pdfIn PDF document text
    • http://xatudoxi.epizy.com/before_sunrise_movie_400mb.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/que_es_balance_general.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_off0000d52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 5840 bytes
SHA-256: b534bae6418fb4982f19d06a5e94d7dd0acad6f115ff486ef1ebe1f7070bce64
font_01_sfnt_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 12484 bytes
SHA-256: c6c9612d9191ba1a90871558db40e9bff762ff7a71bb3fb81b23891a816783a9

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