Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1d242df5b89dec…

MALICIOUS

PDF

70.5 KB Created: 2021-02-21 08:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6a802865819e171816a5f7d664bac30b SHA-1: 02737412fb24e357819ca11c352f15118d7f5fd0 SHA-256: bd1d242df5b89dec5d570304f2429bc44241263d49d36d283ebdc65e1b3f92f0
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://maypoin.ru/wix?keyword=pocket+planes+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427499/normal_5fe6d2c085070.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/Yhhgeio/teacher_apps_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_6015badf27187.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/naxenawevoxavez.pdfIn PDF document text
    • https://cdn.sqhk.co/digodidazo/id0geIN/blank_name_generator_among_us.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_5fe9916e10ac9.pdfIn PDF document text
    • https://fobabunopana.weebly.com/uploads/1/3/0/9/130969757/lukemukudinivub_bududojenigumim_bemulewomolili.pdfIn PDF document text
    • https://cdn.sqhk.co/sudidoxa/Yk4vZgd/watch_crashing_season_2_phoebe_waller_bridge.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/fdhiY4h/you_are_god_alone_chords_key_of_e.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/iczTMje/mibulinilalewofekudoludub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_6031c04266f5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_601b2464e5a55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD951 5176 bytes
SHA-256: 352ac3caf1e1cc4b924a7ac9ab23923b17949c1b87af28f1a854bc57762942d9
font_01_sfnt_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 10008 bytes
SHA-256: 00f33f55ce0e37eec7d345f49d7e6367039cd050ce04951a8250d2b145bd848b