Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd2b7d2efe8ad56…

MALICIOUS

PDF

78.2 KB Created: 2021-03-31 09:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9b4543eab698af9468264585157d5fe4 SHA-1: 2c712f238ec2d68ff354fbc573b035b7ce161ac3 SHA-256: 9bd2b7d2efe8ad566a83e7eeed0340caee9c7fb77b6dfcaa747a588d7a1923b8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to 'https://botokaw.ru/strik'. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest an attempt to redirect users to potentially harmful content or engage in link farming, which is often a precursor to phishing or malware distribution.

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://botokaw.ru/strik?utm_term=triton+is+a+moon+of+which+planet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481990/normal_5fe8ba5f30b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_602c7b0fe9291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_5febc1788afa5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465274/normal_5fcf51ba2fba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_601da7a7435b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_603b9b1f8c4ae.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/panokojol/3082860788.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/tenisixasurorudeguveximap.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/first_grade_reading_and_writing_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/chunking_information_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/92047730710.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/wrist_stretching_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/aflatoon_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/java_file_to_folder.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/sukufinuximanegojererikan.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_d1ccc47bdeb24801901d77d424b2ec96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/lakat.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_aa9bf13a40b44f87ac601fbbbb102533.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/great_gatsby_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/xutobogexavujabejemoz.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_7bca6b1ee851487290193097c7e79745.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ninazarila/wofurilavedinuzifusifew.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_off0000edd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD3 5296 bytes
SHA-256: 67a0cbdfb6f3dcb1a97333d3f58f6911a26e12270caaace4c1287892fa13c192
font_01_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 12928 bytes
SHA-256: 582ab2a7fdaa135b816d97b75abd43eccaffdcf7401f426023ca9a35c62815c4

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