Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1ac9b2e53e812d…

MALICIOUS

PDF

79.6 KB Created: 2020-11-23 08:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6cd72913392e86b3cae15980e7fe0579 SHA-1: bc832ae52c429782457d3f3a3c21661314619982 SHA-256: ab1ac9b2e53e812dea33d63a3999000007b7006c551954075cfc9cba182134bc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=gta+san+download+apk+data+mod PDF link annotation
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/webipejonavuv/votubirasujap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9037bc0c-71db-4d2c-8a8e-0e6e4c86a033/operating_systems_internals_and_design_principles_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86dbc489-fd68-486b-8e07-519500699108/46881656255.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/amazing_grace_john_newton.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/gunevelirakiwafoz.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/incorporating_your_business_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/asha_chilo_bhalobasha_chilo_dj_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85ad773-802b-4b33-bb5e-8da0b373ce6c/365_fear_nots_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/xinijipogivixurariwola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5302b9c1-a5f1-4287-94fb-1ad6fa780f1a/zuvaruken.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/1160731722.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/jofusimekusesobomokut.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 4820 bytes
SHA-256: 185dcfd1ee1832942de480ad84c33c41bc3bcc43c2df16a0646baa46e21b943b
font_01_sfnt_off0000e93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 10540 bytes
SHA-256: dc455beb6a66382f13acd5fa18d1a4b0a221136b564d19616dbf0d976ba03bdb
font_02_sfnt_off00010cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 16660 bytes
SHA-256: 682a406efcdf7dd49f9c494c129bca6394f160b3e372cc4ba493723cd6bcd7e0
font_03_sfnt_off0001231f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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