Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8c9544b69ba57c…

MALICIOUS

PDF

59.2 KB Created: 2020-11-14 10:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1420b462a77abfff9e9de9c7256467ed SHA-1: ea229a9641ea218c802d01f2dc8b7c2660a21603 SHA-256: fb8c9544b69ba57cbe7219a7fc74cf8e127420dc7026819aa2696e5bc715abdc
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 0.9994

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://trafffi.ru/123?utm_term=victor+ultimate+flea+trap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8a26e999c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472766/normal_5fab34a1a008d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_5fa899a177d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fab225939f9e.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/jesidofefe/verutum_rx_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d6df53-2e31-4e15-83e1-915815c2396e/wordbrain_penguin_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0927a8ce-366b-429b-aa9a-b94551c65f7c/lipaziwipolasokaduneluxax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f927bfd3-e7aa-4df4-b743-1183bc964cba/gudaburimoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0768c3f-f439-42c4-a1b3-707e2577688f/94190285834.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/71596380789.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_off0000ac7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7C 4948 bytes
SHA-256: b9905706d57486d3dfe5d0dd35a5fe8db5ca06be8ad7ac7f3f00c1d597158df3
font_01_sfnt_off0000bd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD44 10464 bytes
SHA-256: f72e250f5bd39af1c511f2d510330db5a5989da8599b796f4249da66fea7f21c