Malicious PDF — malware analysis report

Static analysis result for SHA-256 de936d191cc06b30…

MALICIOUS

PDF

94.7 KB Created: 2021-05-21 17:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59454dfb6dbae8f0719b29662291e977 SHA-1: 9e0d78c85a64352c287768f23d5817f17fbe616b SHA-256: de936d191cc06b30fa2c7fc81ee9e5e10af010827e2c3019ad4ddd0488fb82cb
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://maypoin.ru/strik?utm_term=scalar+and+vector+quantity+questions+and+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467581/normal_5fd7f04ef2ecb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fe4ff052c51d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_5ff60312c003e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5ffe25c45b2e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_602d3fde58d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_6010d82567816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_6069621c0a518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_601223e277bc1.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/849173da-3110-4d49-9560-326f12f57e45/xuxiwelufuzotijox.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/tokafopavomulowek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5984b0-21c0-4c7c-b66b-3a95e43af0c9/jesus_healing_the_leper_verse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6714f6d5-1dc6-4b1b-867b-3233f67d925b/kuwamuxisoxawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61073ba2-0d76-4e03-a004-f473a6d47596/2983509958.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/vemarimevires.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2e30ca-0ab8-4847-bacb-57203aabff19/how_to_reset_a_rinnai_tankless_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/zeguxiferutibipebis.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/zofanimoxowuretolabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7fa4f1-d7e6-4952-babe-16ad3e3e0b6b/how_many_sweet_potatoes_in_a_pound_and_a_half.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e49744-276e-455d-b0f1-78ad97aa66ad/20569540399.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 6416 bytes
SHA-256: dc7ab62629aba76a2a1ae9c13196ab608952013a673348275611bf62f0f4ec9f
font_01_sfnt_off0000ed5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 5632 bytes
SHA-256: 52638a48e4bd9acfafe4c1dbea1a04a66c961bbd8f8ef50aaba90aff2b402536
font_02_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 10868 bytes
SHA-256: 2928b101652c31aa2df77e65a9c223c8c6e0712a4f647c92cbe75c2c16159f96
font_03_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 11876 bytes
SHA-256: 82a2b51dc76adde0753f857443823e76e00613331ff985b596d293a9265dc47d
font_04_sfnt_off00014c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C37 16372 bytes
SHA-256: d35b00be33d83201f3c4fed6e8529c1ce884c10a1bc32db4121ff37f42a01c8b
font_05_sfnt_off00016215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16215 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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