Malicious PDF — malware analysis report

Static analysis result for SHA-256 252c61a807f375ca…

MALICIOUS

PDF

73.9 KB Created: 2021-06-07 14:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6288d2429b05c676b97c4331f6e843da SHA-1: 03c7d155e57a050e69e73d8686b15ee95fa8704d SHA-256: 252c61a807f375cad0ae7e66c1cd3a3479248a3393c710fd32720753a18c4a9f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URI points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/pbw?utm_term=gta+san+andreas+ipad+keyboard
    • https://cdn-cms.f-static.net/uploads/4375704/normal_6038c2b3f324f.pdf
    • https://cdn-cms.f-static.net/uploads/4376404/normal_6056862d7f3bc.pdf
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6010e82b519c0.pdf
    • https://static.s123-cdn-static.com/uploads/4387430/normal_5fdfba865ad0d.pdf
    • https://cdn-cms.f-static.net/uploads/4415740/normal_6010591901274.pdf
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5ff2b975c98ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/20ea3481-003b-4f2d-a885-90539a338a4e/how_to_prepare_soil_for_cultivation.pdf
    • https://uploads.strikinglycdn.com/files/a79bf303-2c3d-48c0-8a8d-ad00ed74b4d8/62288481229.pdf
    • https://uploads.strikinglycdn.com/files/4fed75c3-2b62-4e1e-9865-60dfea57aa59/varispeed_626vm3_alarm_codes.pdf
    • https://uploads.strikinglycdn.com/files/f79dd667-91d9-441e-b6cc-50a0e91f7559/how_do_i_reprogram_my_clicker_garage_door_opener.pdf
    • https://uploads.strikinglycdn.com/files/cd5da1a8-124f-4b99-9364-f14d58a5d4e8/combine_multiple_word_documents_into_one_online.pdf
    • https://uploads.strikinglycdn.com/files/e59721ab-ff57-4cc3-b168-6e2c50ea8aa4/what_causes_inflammation_of_the_piriformis_muscle.pdf
    • https://uploads.strikinglycdn.com/files/9027ceb9-efbf-42af-9a80-23b284976827/xexuxotexoxirinisevopis.pdf
    • https://uploads.strikinglycdn.com/files/de81e12d-2f6e-4a5a-a699-5c0a8e4b5a46/78728174150.pdf
    • https://uploads.strikinglycdn.com/files/819460a7-a272-411a-8dc2-41b9139076ac/city_of_bones_chapter_19_summary.pdf
    • https://uploads.strikinglycdn.com/files/0e7c0e34-d06a-4cb2-a4f4-0148137c03e1/95066403817.pdf
    • https://uploads.strikinglycdn.com/files/b9547f79-81ad-4ef0-ae42-343c566f95ae/venapiwiwumam.pdf
    • https://uploads.strikinglycdn.com/files/0b918aa6-a617-4571-a0db-2f3e868a6b3f/95792275545.pdf
    • https://uploads.strikinglycdn.com/files/861cfe52-3c42-4cbe-8928-5ed7063e093e/how_to_cancel_brinks.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2fa.bin
953f039d517d595aa929c3bbc6ca4621f977b6c1c6a85cebb4778e5579465cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 5260 bytes
font_01_sfnt_off0000f4f4.bin
180abedb668b58870223f428b9af749feeaa1155d22a7187635cb5d94bcf294f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 11096 bytes

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