Malicious PDF — malware analysis report

Static analysis result for SHA-256 0475185010aa81e7…

MALICIOUS

PDF

76.8 KB Created: 2021-07-22 03:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b855f0d8a212d30cc5f151d46552bfe SHA-1: 17199665538b78508609589f8626502a760a3b1f SHA-256: 0475185010aa81e7c6737b1d95c8cec243883867816835150a2cb1da67e35c38
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a page discussing how to insert a scanned signature into a Word document. While the final destination URL is benign, the presence of the embedded URI and the overall detection suggest a phishing lure. No scripts were extracted, limiting the analysis of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://feedproxy.google.com/~r/sq/ugae/~3/-7-cX3opz_8/square?utm_term=how+to+put+a+scanned+signature+in+a+word+document
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9144b92abcc18c4f57dac/1625887819574/class_10_english_chapter_1_ncert_solutions.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f034e139c5d52effb92984/1626354913168/boxpei_puppies_for_sale.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5a8286aa876280be8c7a/1626233474887/to_be_careless.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7f08288cf71862a90cd8/1626111752866/tentatively_meaning_in_gujarati.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9063a92abcc18c4f4d30f/1625884218163/jomipumigusetesibogi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f814abf603c47074ebe3b3/1626870956127/gebepefemuxewipizarum.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f01eb3b37dc55b035181c5/1626349235549/86339550846.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e88a6da655de1343d859d4/1625852525406/principles_of_electric_circuits_conventional_current_version_9th_edition.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8e1ec81c37306b2f679f/1626115614745/gunoxokusumuvajebo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2a6f27e0b4d5f6b134ca3/1626515187142/voxuwiwifopuligo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f652b2514b21793b4f1c38/1626755762956/70973613993.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f542645f13a15bd836084e/1626686052795/tudadipevagezugim.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f7d52a642c6765490c3586/1626854699038/ethnic_groups_in_luzon.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e881cd1ff85b78eea46c17/1625850317709/digital_business_card_ppt_template_free_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2dbe5e13ee97666023913/1626528741280/all_drizzt_books_in_order.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f267cd1d35070742157142/1626499021912/arsenic_made_from.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9508831aaf5e928bc05d/1626117384897/unblocked_games_sports_head.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edce3cb0089c62dc3c74e7/1626197564557/mizetitosagazutadimurobo.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc77.bin
e36b6bb3a04b88324a9a9da784ce553a6dddd121b4e36a09e0eec1534329296f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC77 15608 bytes
font_01_sfnt_off0000f498.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 16792 bytes
font_02_sfnt_off00010caf.bin
efc9e9281c802762910376155622a981a76fded1feaeaa929560a9e2214dafdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAF 10988 bytes

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