Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e8064ebce07a88…

MALICIOUS

PDF

66.7 KB Created: 2021-01-02 19:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1c85cbee15768e3ee1e2be4c8c79abd0 SHA-1: c02818f359258395952e7d924c9e917af6aa8396 SHA-256: 50e8064ebce07a8861bdf4c24beb52ae8ab1748a09254107c51894742061c78d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, contains text related to 'escape tv schedule movies', suggesting a lure to entice users to click the malicious link. The ClamAV detection further confirms the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=escape+tv+schedule+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426816/normal_5fbccaee8d8bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5fdaf15a24721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_5fb2ca6e4f694.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/7b2cb05c-576b-4a16-8e85-00f10a7c4b3c/sebisomolugurexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2602b6e-f2b6-4d1e-a9bf-f8c833211f55/download_kubo_and_the_two_strings.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/make_a_rooted_android_device.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/opposite_words_in_english_a_to_z.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138575d0-4a04-4c93-bd10-220577dca918/29057523130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f817f2f-bd40-4bcf-a7b9-8535fbad607a/53379604326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7675bdde-ea76-46e5-ac60-be43a19a43a2/zodobixijovenasikedipin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9767041-787a-4c3b-b196-6798484132c1/husqvarna_345_owners_manual.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_off0000c8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A4 5232 bytes
SHA-256: b0a24d1fbc7c6460816cac5a1064820d486a1693312c922294b57dc6c043f4b4
font_01_sfnt_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 10456 bytes
SHA-256: 40381122a7835ab069e18a7b486f5173f55667c4d4686e14ef1867901dc2c21e