Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ad62e767ff7a68…

MALICIOUS

PDF

70.4 KB Created: 2021-01-31 11:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8b8f7901f677aa094efea1424767d14d SHA-1: 8af1449c2a73898dc95a257fd45db3c184602683 SHA-256: 61ad62e767ff7a68f4493d92b635f739b32018a0f244d34c73ade9467efb5277
196 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
  • 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://jottigo.ru/wb?keyword=2000%20green%20party%20candidate%20crossword PDF link annotation
    • https://vaxevadokipab.weebly.com/uploads/1/3/4/6/134610393/bijufajasaf.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/4993021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zukisofom.epizy.com/97928528459.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/49191192655.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/82353559082.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/acr_staffing_guidelines_for_radiation_oncology.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/fozifixixitaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/86842675155.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/100_day_plan_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/geographic_information_system_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/61294778919.pdfIn PDF document text
    • http://lapekekefexe.rf.gd/lelozuret.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/72250347265.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/google_adwords_certification_study_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/2487535382.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_off0000d646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD646 5584 bytes
SHA-256: 54b9c72d08942979502f3f776c94fc2ea9e7a8820501837842269c0ccd6121f2
font_01_sfnt_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 10496 bytes
SHA-256: 794ad650def24a242e8950ad0a7c9ba319d00d85e37a2404002ddab191f671f4

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