Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9639fd8442bad4…

MALICIOUS

PDF

70.5 KB Created: 2021-01-21 01:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 542526f2aedac9fd4f0822be3e9cba22 SHA-1: 27931247f97c87de54178a5258f19ba75bb85c09 SHA-256: 3f9639fd8442bad4b16a62cad5f065b3061f550cd592a21b338c9f1e5c0b0d80
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://baarspo.ru/wb?keyword=istanbul%20frontiere%20europe%20asie PDF link annotation
    • https://dajepulexito.weebly.com/uploads/1/3/4/5/134591334/lenelipag.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/gibobitujigi.pdfIn PDF document text
    • https://boxuvudadutubip.weebly.com/uploads/1/3/2/6/132695546/kakizojezofu_zeten.pdfIn PDF document text
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/2702776.pdfIn PDF document text
    • https://torolanomopefi.weebly.com/uploads/1/3/0/7/130739669/vesosejegugiv.pdfIn PDF document text
    • https://cdn.sqhk.co/julukiporo/eEgVVLo/42352019473.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/licUsge/kick_the_buddy_gameplay_1337.pdfIn PDF document text
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/2284853.pdfIn PDF document text
    • https://cdn.sqhk.co/vejanozugova/pihhchi/flying_speed_flame_hero_flame_hero_robot_games.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/wupixufekijax/statin_guidelines_diabetes_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/ames_test.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/tetafirepidatodiburojidow.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/catapult_king_apk_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/latest_bongo_songs_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/rawapogagor.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/93661920938.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/facebook_business_contact_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/rumon.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_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 4972 bytes
SHA-256: 27885266d6ff2fd21095ab5f24a327ad81700ba7556945a4b7c584d39a55a320
font_01_sfnt_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 12212 bytes
SHA-256: 699b5dc184075520bf449bafbe31db6e2f20851c736bb6bdc6817ecb9fe433a1