Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cdd42cb542c96a…

MALICIOUS

PDF

72.9 KB Created: 2021-02-09 14:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: dba118181795ced697eb16474196276b SHA-1: 3cff9e2b47f95934342574cddbc9eab9e51dcd64 SHA-256: 43cdd42cb542c96a269c2d95a130ed531d6e84bc21b92af6b26a94c0a0b7e334
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://bologen.ru/aws?utm_term=pradhan+mantri+awas+yojana+online+form+rural PDF link annotation
    • http://remontlegko.info/lego_heavy_weapons_instructions_freed0858.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/bafijidifikaxiz.pdfIn PDF document text
    • http://gewarum.66ghz.com/nova_black_hole_apocalypse_2018_worksheet_answers.pdfIn PDF document text
    • https://zuranuwazob.weebly.com/uploads/1/3/5/3/135332575/gesugox-padizelesituz-benuwufebud-jobigotu.pdfIn PDF document text
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/xodozafuxurip-xixaxejufatag-ruzexagur.pdfIn PDF document text
    • http://sexesex.site/osrs_dragon_hunter_lance_vs_crossbowgwx1a.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/jjXmidC/potog.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/vupifenev_wuwirepunajo_dogarologegiles_nosidi.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/ca_foundation_books_2020_free_downloadonsxk.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/shutter_count_apk_for_pczewsg.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/tibanepoxilibud/herobrine_totem_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/fosadagalasefi.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/pumop.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/30442675376.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/10614541379.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_off0000e038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE038 5416 bytes
SHA-256: 16ffcec0f285812bf19dae5afbd7bf69b75b11ce0335cc8db95bd544ab8faecf
font_01_sfnt_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 10576 bytes
SHA-256: 3778e537a64a104a703fd5040644d574cf3f98f7370d24eed439c85c26f78702

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