Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cd7e308fad0cb5…

MALICIOUS

PDF

72.2 KB Created: 2021-01-08 23:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a48dd2dc05f5355e572ff57a92e49ea5 SHA-1: 05bddb269634c345bea02fcc5a16d5a90a19938f SHA-256: 38cd7e308fad0cb5e1801253093159fccf0122670c4d3b98d8994fd6d75cb8cb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a domain that appears to be used for malicious redirects or phishing lures, disguised as a search result for crochet patterns. No scripts were extracted, but the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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://trafficel.ru/wb?keyword=granny%20square%20crochet%20pattern%20diagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450421/normal_5fcf9ed05729e.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/ejjw9hj/lineage_of_jesus_from_adam.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/e2c264f6-cefa-47b9-9427-f53803d64f65/zion_national_park_trail_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fbae949-45b8-4a60-a171-6f6aa16b2d80/bojefasowewibexu.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/28489906813.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/administrao_direta_e_indireta_exercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3c2b7e-a6dc-4596-911c-f4046f409036/90703078241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b7b021-e07b-4681-991d-ecf12f653557/jett_skill_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5753cb-49a9-4aa1-80f2-b03c509637da/costco_sewing_machine_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf02e88-71d9-43d1-8058-3c9b10bf3c1c/49163883514.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/inventory_report_in_tally_erp_9.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/technical_report_writing_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/os_x_10.11_4_oder_neuer_install.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_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 5712 bytes
SHA-256: 73177c39c555ffbeecd8a0997239a8a160f3afad99489bc3729dff029e67f1ce
font_01_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 11256 bytes
SHA-256: c530f570285bf3b4e43708e9cdefbc539f5ad3a72f723befc6d4ba011ca535bc

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