Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9359d234110c1c…

MALICIOUS

PDF

72.7 KB Created: 2021-02-14 07:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ddb81de06c8a0f204a25c0caab305bb6 SHA-1: f83ded664cd32406608b261651c1fe693334a10c SHA-256: 3d9359d234110c1c23727eec0e5a262519d8082f5d70be2c79adce4ab8a2a8b2
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://maypoin.ru/wix?keyword=genetic+mutation+pogil+answer+key PDF link annotation
    • http://mirror-x.org/rupujoseweguxukusatixodur5lwva.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/6524911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5fd80c4729135.pdfIn PDF document text
    • http://uscreditinquiry.info/businessman_movie_songs_free_320kbpsm6uwd.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/zidakubutezedativotye7y.pdfIn PDF document text
    • http://fbdirect.site/15989541356fth9t.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/vuxagixil/anemia_de_fanconi_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/bokeh_effect_png_free.pdfIn PDF document text
    • http://meluromotav.rf.gd/hampton_bay_ceiling_fan_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/lisezuze.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/zumixajururiv.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/fiwotazirelulelolabojobe.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/namakifebopuwones.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/cancionero_jose_jose.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_off0000e132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE132 5540 bytes
SHA-256: b7cd849895ec09c29f00f8d8d2217e45c278fabc4d08fb5059385f26f8c45b6d
font_01_sfnt_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 9972 bytes
SHA-256: febec6d0d8d1ec7dc8d96443f4652eae3d3626d100a86284af70162b6fd9295f