Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4321c6de916578f…

MALICIOUS

PDF

74.2 KB Created: 2021-06-02 21:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 789b835536f9392ce9affc7645417eb4 SHA-1: 8b1a22e470082a74f6bc5b06f7a846ba3ec2e16e SHA-256: b4321c6de916578ff3b485c33b1bbc02b2784b1d198acf7aa1d70ec7d8ee92e2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/pbw?utm_term=chevrolet+corvair+repair+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489599/normal_5ffd6d16f1d9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408878/normal_5fc8662eba832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474734/normal_6002c08d6f058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450504/normal_5fde6de45bbd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456671/normal_60010033a818c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_602a2bb9cdd50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6032c4eff0de2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475196/normal_6001d20beaeb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_601588a9ee8a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_60b79854b4aad.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4413019/normal_60b4f92867263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xetibubib.pbworks.com/f/kirigami_pop-up_card_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4666ecdb-5ab7-4107-a3a4-4c8efcd168c5/jobiluvogifakusajupad.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/f/pubabofadetunofuwaxiwowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a0c700-2924-4e93-92b1-6451e08dd2b2/how_to_program_viper_479v_replacement_remote.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144463749/libro_de_contabilidad_financiera_de_gerardo_guajardo_cantu_7ta_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b448b0a-43dd-4979-bbc0-46982d137f44/96650190135.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/tales_of_the_yawning_portal_maps.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144461484/91191639182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c727e41-88d7-40c2-b20e-50238db1bbd8/difference_between_instinct_and_emotion.pdfIn PDF document text
    • http://mikabipi.pbworks.com/w/file/fetch/144457605/65584820364.pdfIn PDF document text
    • http://rixepal.pbworks.com/w/file/fetch/144499431/gravity_guy_unblocked_games_66.pdfIn PDF document text
    • http://fuzobonesujo.pbworks.com/f/82692337722.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_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 5180 bytes
SHA-256: 000f1e51dd7757b0f64182403ffaf08d478ef8e93f913425984077b513c2c0bf
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 10400 bytes
SHA-256: 97bd6f1cf60fc1dd2624b5e6b48ae1a925a8832844626ed006f83df42fa0f098

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