Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c7e5dc68753004…

MALICIOUS

PDF

77.2 KB Created: 2020-11-10 11:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d5b609b8a2a565b4fc56de6652dab191 SHA-1: c333b11fde49c391f6080b5c68a0c9ff58462bca SHA-256: f9c7e5dc68753004b19e01b209eca2176ff2a2d07f0b8e36d55c30ab264d4377
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 0.9997

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://traffine.ru/aws?keyword=ecology+biology+test+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fa5f12f6bc18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fa68e401d9ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5f9de24db6025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f98409962b46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5fa42ea8125db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_5fa7be3ddeaad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tugumeb/73885454391.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/capacity_planning_in_production_and_operation_management.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/33738560269.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/family_feud_audition_video.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/69471223779.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/96925618824.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/sadlier_vocabulary_level_e_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000104e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x104E1 21004 bytes
SHA-256: 5003ec017db871dedc95ddf0af3911e027c233c2913c2388b65a681f08cd472d
font_00_sfnt_off0000cc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2A 5324 bytes
SHA-256: 8dce9646d303511189811dcddb71e7d136212ddf49b40d7822882ddd0b134c5a
font_01_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 11264 bytes
SHA-256: 843e9cfdb6fe458a77554e097de57078f219d940940f00aca3ff088b0a10e4f9