Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d396ef37721592f…

MALICIOUS

PDF

71.6 KB Created: 2021-03-02 14:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7cfaac278b3d216efc3a698941e4c46a SHA-1: e4ae4c48d78d0ceac754655f6029e7a0c3930a21 SHA-256: 8d396ef37721592f166cc7ae2f5f5339c2a02286017dd3c17b87ec6751016b00
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://nipisod.ru/award?keyword=beatles+songbook+chords PDF link annotation
    • https://cdn.sqhk.co/rovukupovumo/chi0hee/kilokeg.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/bSkjbD4/8966719520.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/djdxjjV/color_blind_an_eye_for_an_eye_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/lBLgfs7/2300616956.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/ibgg5td/world_at_war_magazine_games.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/hjihgNf/90110160151.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/dGvT4hg/24605123237.pdfIn PDF document text
    • https://cdn.sqhk.co/gixobujikelu/Lzl0Pie/family_mysteries_2_echoes_of_tomorrow_review.pdfIn PDF document text
    • https://zetozegazironik.weebly.com/uploads/1/3/2/6/132696155/semuwevovadikekifixi.pdfIn PDF document text
    • https://cdn.sqhk.co/tenerinirik/oXlRhgN/100daysofrealfood_pulled_pork.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/fedure/calculo_resciso_acordo_reforma_trabalhista.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/romiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/79735368588.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/salosabuzazumisufok.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/maytag_appliance_repair_green_bay_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/6732336117.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/wallflower_planting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/d_d_e5_character_sheet_online.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_off0000d89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 5456 bytes
SHA-256: c460ad28ddf2321136498c55f88e5c44a9dc39145456d2c9537c611bee6b42b2
font_01_sfnt_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 10808 bytes
SHA-256: a3f91c1211b83daf7f43ca7a1d4f5dbb4e899868b6a346ea01b86ba9adf741f4

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