Malicious PDF — malware analysis report

Static analysis result for SHA-256 521cec040536c815…

MALICIOUS

PDF

72.4 KB Created: 2021-02-14 21:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d7b29acb837d9b89d9d912c104ad3225 SHA-1: 35061a133fe4815d4303bb71b26fdc403f45e538 SHA-256: 521cec040536c815e5a97b7290d359b26dfb1a9ad1c429115dcca49209028d87
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/wix?keyword=san+onofre+trails+surf+report PDF link annotation
    • https://cdn.sqhk.co/gisepavuv/Aqygjxr/devotional_stickers_for_bike.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/hbW1Ejh/sceptre_65_inch_tv_dimensions.pdfIn PDF document text
    • https://fakedowekiz.weebly.com/uploads/1/3/5/3/135314463/kiwatiloxu.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/mjeMiab/xiweb.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/dbibjgD/vesugirokobafotiridimulo.pdfIn PDF document text
    • https://lixepugoguzezum.weebly.com/uploads/1/3/4/1/134132265/8515322.pdfIn PDF document text
    • https://powilamalowigos.weebly.com/uploads/1/3/4/1/134131405/dozud.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/t9jijee/vowufajaloxegezawi.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/yQhfDgf/helix_smash_hits_unplugged.pdfIn PDF document text
    • https://cdn.sqhk.co/susopavazane/Nhdcgcv/light_it_up_song_fall_out_boy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_601411ad9864d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388833/normal_5ff1340283e4d.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/ijjjgjj/forimad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanusilos.epizy.com/nagilelopexasuzulojavi.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_off0000e103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE103 5000 bytes
SHA-256: 1aa055fa3579d9c728910a9f79b37413008d83a0a111e2c49222e60db12b47b7
font_01_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 10264 bytes
SHA-256: 250490d19e836afdcea0a2f60ac5f2b0a8a789953c175bd15b76dcb78c20e55c