Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1d890630e96217…

MALICIOUS

PDF

70.8 KB Created: 2021-02-14 09:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 851eb0734abfce5a802f37076efd502f SHA-1: d8e33a39ceda523b7ec596f4ddcf7bccb1e3f12d SHA-256: 3a1d890630e962178e384583c0e6d8182dd950380af84c8c50b016812e531adf
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/wix?keyword=american+pageant+ap+edition+updated+16th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407998/normal_600c48653d529.pdfIn PDF document text
    • https://cdn.sqhk.co/fofubulami/5Nfhcs5/lebukukagogowexaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483851/normal_5fc5add1b5322.pdfIn PDF document text
    • https://subutadenurafo.weebly.com/uploads/1/3/4/5/134581349/razoxukebirezu_deberez_pilebimukawa_tazisu.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jg0xGhd/galaxy_glory_hack_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/hiVgIij/word_search_solver_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/jiMHesw/xamewut.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/hVTc985/hello_neighbor_2_free.pdfIn PDF document text
    • http://verifedform.com/19314012064t4w4p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_6011172a61593.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/heKlBjf/dovigoteripo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490244/normal_600fe94b52479.pdfIn PDF document text
    • http://lishop.site/61753285185pelp2.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/jcYgghf/my_girlfriend_talking_to_other_guys.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/nafoxuda/tujevaxanaju.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/addressing_selection_criteria.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_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 5552 bytes
SHA-256: 761095845f1f9dcac7ca4756a85a64af9abe3adc9c055fe9d7ade13e9076baf9
font_01_sfnt_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 10540 bytes
SHA-256: 1a1bb0482ae56ed448a109173b2e38d9ab3d63c4dad7a21595fd6c05e43beafb