Malicious PDF — malware analysis report

Static analysis result for SHA-256 78656f4d57e039c7…

MALICIOUS

PDF

90.5 KB Created: 2021-06-08 06:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 614e9a254c69fa4a8310efc2ffa315b8 SHA-1: 0b6a780a134fb75b070c02df257e4e061ee9fb5b SHA-256: 78656f4d57e039c724f940fcaeb7b3cf9d8cd70028870be6187059d4996989b6
96 Risk Score

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 0.9983

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://pixomot.ru/pbw?utm_term=hsk+4+standard+course+pdf+vk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459482/normal_60be96b4a291e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_6026e2f5c571f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fe82f291984f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fd098fdd9ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5fdabd4f5a38a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451019/normal_603dfc88e2c96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484805/normal_5ffac5c79b7ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_600c422db4056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_600c68206324d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_60689c8a89856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_6017b10a6258f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447270/normal_5fed64ac67e93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457006/normal_5fd0758198c77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503387/normal_6000715b5f7b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_606e12f450885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5ff892653f732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_60bd5b6ea6b8d.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/f394d195-3d20-47a7-9bfb-8767cc8cf758/85836285870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c70cb1-aba7-4611-8090-3a653f099975/tasuwufuledebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c426e86-115a-49d5-9457-eca98bc7a97c/jutepolaponolidigefup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d78b0d8-221b-4f98-82c6-3037ec3a8e69/sawogowepazedegera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ac0527-32c5-4e5c-a103-8565e9919483/english_to_bengali_dictionary_offline_software_for_pc_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188d1dc9-38cc-4464-8efd-3ec6f65605c0/the_other_side_of_the_door_2016_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4367e4cb-c33c-4e94-bb48-5bf12e80c731/gilafewemakebid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31a3f76-e4c2-47bd-9a2b-dce259edacb2/46627541227.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 4320 bytes
SHA-256: c3cec3a763bcc9161fd7bd209b9bce9761bc21f81de460e27a83bc09c9f20bd7
font_01_sfnt_off000104a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A3 5292 bytes
SHA-256: b7f734c79b376080c2621ddbbd06f0f34cb624eaae69e2f47a14ad174daa92e7
font_02_sfnt_off000116bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BB 14868 bytes
SHA-256: 2478e6ce87c53f3b058ba41917fa55d112860f76aa58d9689a863d9e477b1733
font_03_sfnt_off00014569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14569 16060 bytes
SHA-256: 1018660efa6a1a00280f0dbd6ee9814149b2344b9acf14d98de2cb76d1e712aa