Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd36dbfaf428e6e9…

MALICIOUS

PDF

75.6 KB Created: 2021-01-06 07:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bb8ac1c5900a5def3674a294b170c5dc SHA-1: 476cdb0257692be0219ec77c1103962d929508e8 SHA-256: dd36dbfaf428e6e91e899a705f64ab58404312d51c0f6367daabd0f66fc36409
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'compression hosiery size guide'. No scripts were extracted, but the presence of an external URI and the ML/AV detections strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=compression+hosiery+size+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5f8e2c3185fa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_5fe812388c206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5fb5c34130f85.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/hfhjM5H/tevure.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/3bbe0eaa-a605-444d-afe3-0cb894d57907/robotica_control_de_robots_manipuladores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f441ff6e-7709-493d-8663-dafb3f9b2c37/vakin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec3af8b-77b7-4807-bb9d-a1481fa4f3f3/logisujotazakutumefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e7acf6-f236-44be-ad2c-75bb4ca0a8a9/27764009786.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/70733061468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12bcf39-00cb-4528-8ae0-1d77eda52564/icons_superpowered_roleplaying_the_assembled_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1aa7845-ff0a-4e7e-a478-c474c146d536/boo_from_mario_tattoo.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_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 5188 bytes
SHA-256: 3efa35cdd96c2b844a62aaebc40abc77cff7ba9a4352ac5260a43285f6bea950
font_01_sfnt_off0000fce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 10740 bytes
SHA-256: 0c48cb1d097135ef41c9dad703b29973fa47268c3eb67ab061a5721fa54cf49e