Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1b80ad0d4f01ad…

MALICIOUS

PDF

73.5 KB Created: 2021-03-20 15:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c67711ce4419c9403ab368fab9da0dfd SHA-1: ab88f1c3f80fe23a4560d56ab7389be04e3cbc92 SHA-256: 9a1b80ad0d4f01adfeef3720d6dd11906c051e33dfdc21c0069a0c5febedbe4a
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 SEO-optimized and point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a phishing or malware distribution scheme, likely leveraging embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=kaththi+movie++hd+720p PDF link annotation
    • http://dogalijun.scienceontheweb.net/dell_latitude_d830_video_drivers_windows_7_32_bit.pdfIn PDF document text
    • http://gawajix.iblogger.org/taxow.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/hd1gfsq/12152489595.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/ajfgchg/sipezowilom.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/pdf_candy_desktop_key.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/cEhbwBY/xegesisimarux.pdfIn PDF document text
    • http://juxisuzuvu.iblogger.org/71845661212.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/magapeguwabe/54310026138.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/fawaferubowuwof.pdfIn PDF document text
    • http://ligiwekuxote.myartsonline.com/73918119952.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/hyrule_warriors_linkle_guide.pdfIn PDF document text
    • http://nadezuj.epizy.com/vamof.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/89452537260.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/jebirovo.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_048d7dcb0aba42f09b4c895b6b3ee02e.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_dd30bd32204b475ea3b010026aedac34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/ikea_hopen_queen_bed_frame_instructions.pdfIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_11a451a6460c4716a0044161e26df5fe.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_c1e8cbe07fc0491ba053e02a0b98dc84.pdf?index=trueIn PDF document text
    • http://bajobakokela.epizy.com/earthbound_onett_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/comet_vs_asteroid_worksheet.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_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 5276 bytes
SHA-256: 627aed5e21e3d2116c756508633ea8414190a8545098b6d51091490062bb2721
font_01_sfnt_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 11024 bytes
SHA-256: be106c2d2e8d1adae5b3897bd623b8211bba9e95d4e100d3011cad7614f1ce3e

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