Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e739698d0020ca…

MALICIOUS

PDF

65.4 KB Created: 2021-03-17 09:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6f4c10964fdfbbb76c7651a32eb4b7 SHA-1: d2232892ccefb5e75680b35625cb4c5f061da1ad SHA-256: 54e739698d0020cace8cfadddcba5f65cd0468ab589c00b2854165b47caad047
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for malicious content. The primary malicious URL identified is 'https://soxebez.ru/award?keyword=beatspot+pdf+free+download', which is likely used to distribute further malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=beatspot+pdf+free+download
    • http://zarabatyivat.ru/can_you_transfer_disney_vhs_tapes_to_dvdmku8w.pdf
    • http://greatmasters.biz/traktor_s4_flight_case_ebay5l9sq.pdf
    • http://fisuruwibowin.66ghz.com/60534170422.pdf
    • http://hempmap.ru/is_it_worth_having_a_casual_relationship_is_getting_seriouscgjaw.pdf
    • https://cdn.sqhk.co/lenawemijixe/icnJicX/paint_sprayer_for_cabinets_reviews.pdf
    • https://cdn.sqhk.co/jurugaguvedu/HoPjgix/woxajafapazigaterite.pdf
    • http://nnorm-id.com/lia_informant_app8xtkv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pafiganovavi/aol_mail_for_mac.pdf
    • http://jarunotaso.rf.gd/human_trafficking_in_the_united_states_stories.pdf
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_c38b0c469ff24eb19a13022d12f03cd6.pdf?index=true
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_11cda9f4025b4672914b93ed0c6b9a50.pdf?index=true
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_48309b1e1c984772aac9425c4c33d834.pdf?index=true
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_68e30cb997dc47dab969ef221de7f4dc.pdf?index=true
    • https://s3.amazonaws.com/fewunadupop/37836463428.pdf
    • https://uploads.strikinglycdn.com/files/0e3b62b9-43c8-468d-848c-2a457cc871b1/lixudukoredowupe.pdf
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_ebbe044456a2416d80a1b63885e308a3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/03d0b63f-832f-46d7-b639-3ccdd9eb80b3/excel_vba_find_file_wildcard.pdf
    • https://uploads.strikinglycdn.com/files/5b15823b-d69d-460d-a6ee-522b3615ee84/69162833864.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c448.bin
096a0640b38fce59d8618b822a8fc0588af9c248647ba3acc279d26d135af082		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC448 5176 bytes
font_01_sfnt_off0000d609.bin
2653b247c9a881cd804c58f0586a310b43c44ff974c644baa0f4407e33f0a96d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD609 10128 bytes

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