Malicious PDF — malware analysis report

Static analysis result for SHA-256 1493b84f0ed41fdb…

MALICIOUS

PDF

77.3 KB Created: 2021-03-10 01:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6cba2d826b6e78cf681b5ea9e0ddc7c7 SHA-1: b2b0d4cd2b5b88075bbb655134f9d24c63ae3957 SHA-256: 1493b84f0ed41fdbf5a11704b6e64d51225b9d6e51c9dcdb2780f3d57ac50661
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to potentially malicious domains like 'bologen.ru'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=spongebob+bikini+bottom+genetics+answer+key PDF link annotation
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/17b15c.pdfIn PDF document text
    • https://gogiwikiweraf.weebly.com/uploads/1/3/4/4/134441224/8d9ab3ce14.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/buwuguteruburifebo.pdfIn PDF document text
    • https://wonelapafilujol.weebly.com/uploads/1/3/1/6/131606162/jidopopeso.pdfIn PDF document text
    • http://lufirisor.iblogger.org/libiz.pdfIn PDF document text
    • https://pusurezifokuni.weebly.com/uploads/1/3/4/3/134317864/fijakixovujo.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/how_to_yoga_breathing_exercises.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/telewo.pdfIn PDF document text
    • http://tapopapebesawu.getenjoyment.net/64132734757.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/b3efcbaa300dca.pdfIn PDF document text
    • https://wusowekop.weebly.com/uploads/1/3/2/7/132741020/7163575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_6c279480d11f4334a4a2e58fbdcf330d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/somuxi.pdfIn PDF document text
    • http://faligesiba.rf.gd/51250525983.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/south_movie_2018_mp4_movies.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_76e7012165d74838b5024dc901313c4e.pdf?index=trueIn PDF document text
    • http://melaworogafema.epizy.com/lazodajize.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_800633f7b2ad4e419440332827a974cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takurugilij/capra_cu_trei_iezi_ion_creanga.pdfIn PDF document text
    • http://duribolatajofa.atwebpages.com/mini_crossword_puzzles_la_times.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/indian_railway_train_route_map.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/dictionary_arabic_to_urdu_free.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_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 5720 bytes
SHA-256: 6f73c2510c3beca0af1b3b03d0b192e7fa8edeff9f919317b66ad52f7265dc3a
font_01_sfnt_off000103e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 10492 bytes
SHA-256: 6350c583a0d4a3edbf6d5f45aad827f59fc345153af3720f3039972af4c84f46

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