Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c47f5abf015770a…

MALICIOUS

PDF

71.3 KB Created: 2021-05-25 11:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f2c3ae6869171c664973a49938594c35 SHA-1: 8fc1da648cd6016cabba62dccabf61b99654a3c9 SHA-256: 6c47f5abf015770a07960cfd54fe8d8611fef15f50fc86ccce6f0c22a67ac6ed
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The PDF file contains numerous external links, with one prominent URL suggesting a lure related to Google Docs and Excel spreadsheets. Heuristics indicate it impersonates cloud document services, aiming to trick users into accessing malicious content. The presence of multiple external links and the ML classifier's high confidence score support a phishing or malware distribution attack pattern.

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://leonvi.ru/strik?utm_term=google+docs+import+excel+spreadsheet PDF link annotation
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/b7422.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/pijofakubexuwawetif.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/74d791d.pdfIn PDF document text
    • https://vonazevuza.weebly.com/uploads/1/3/4/6/134603973/0a92b2b44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aae4961-ef13-4a7f-b75c-2193783b4162/4_by_4_oll_algorithms.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/kokexik.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/eternal_city_wielder_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/33404466860.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/hard_reset_tp-link_tl-mr3020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d504172-78f6-40c0-bbb5-bd4e8774931e/bible_concordance_and_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/sedugadirinexopelofuwed.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/my_bp_lab_app.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/cultural_nationalism_apush.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/mikude.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/50494760854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f4c017-8c45-4443-a15a-45c704fe01ee/55947519939.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/ap_edcet_hall_ticket_2019_manabadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3c1e5f-a0a0-4f7e-8ded-1e8ba5f2ab1d/xubemetuzizajod.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_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 5584 bytes
SHA-256: cf510d48038d3fb2fc6931cbcba64b9fc727fa96dfe3eac5b6bf4d309111e395
font_01_sfnt_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 10728 bytes
SHA-256: a00a65d6837e424c377057add90026f932d9ac343b4e42447f919c84a2d4e2af

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