Malicious PDF — malware analysis report

Static analysis result for SHA-256 719679ec1345e4c9…

MALICIOUS

PDF

63.5 KB Created: 2020-12-20 07:34:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 499e0a115278f32e2c5a81c384bd8ec4 SHA-1: d33a995e4603cc8b3265ae56494f8654f918234b SHA-256: 719679ec1345e4c91134e9162f65398b9bd1d025a5835937099b59ba3f29fef6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature. Although the document body is heavily obfuscated, the presence of the external URI suggests a phishing or redirection attempt to a malicious site.

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/123?utm_term=kozy+shack+rice+pudding+walmart
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fbc2df7e97eb.pdf
    • https://cdn-cms.f-static.net/uploads/4447877/normal_5fb997959ae44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5c30f0f4-3c34-44cf-a857-deae8933a265/28121307564.pdf
    • https://s3.amazonaws.com/xafaxotaful/sagojiviwixibizufud.pdf
    • https://s3.amazonaws.com/gedimuta/android_one_rom_for_mi_a2.pdf
    • https://static1.squarespace.com/static/5fc007c924b06a7eb3fa3bc3/t/5fc0ef303c6ccf69f37f94df/1606479664826/van_sickle_paint_lincoln_ne.pdf
    • https://s3.amazonaws.com/ravuxudibure/the_dream_of_a_ridiculous_man.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/novup.pdf
    • https://uploads.strikinglycdn.com/files/2052d451-a995-4f09-9f43-c5226bbba262/gazoberezoxik.pdf
    • https://static1.squarespace.com/static/5fc35f5bd49dd124474406bb/t/5fc5277f145a8629dc56b7aa/1606756224099/kapofokibu.pdf
    • https://uploads.strikinglycdn.com/files/30b370e0-e3e0-4b72-93d1-e7f2d2a37e9b/taponewupolan.pdf
    • https://s3.amazonaws.com/panokojol/spiritual_and_scientific_research_on_arabic_letters_and_numbers.pdf
    • https://static1.squarespace.com/static/5fde97c9d0ff57695e6cefc3/t/5fdea8736a6ad7222f1db3b2/1608427635919/27935516157.pdf
    • https://uploads.strikinglycdn.com/files/4d31961a-378d-4aab-a558-f0affe2615a6/33725441926.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeb1.bin
bf359934a4537d5eb3779c5e3a5bfd44e80bb1b66b99b20672ddd3d1418115e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB1 5644 bytes
font_01_sfnt_off0000c1d7.bin
28fd58c8a58b170b051096cca54fec8cdcb539c40b3fbf0131523fa7e0d60ec8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D7 9848 bytes
font_02_sfnt_off0000e2fd.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 4324 bytes