Malicious PDF — malware analysis report

Static analysis result for SHA-256 a930636cf96e7363…

MALICIOUS

PDF

74.1 KB Created: 2021-03-05 07:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55a2e7d55595b851d3bec18207f1cde5 SHA-1: 240db52204a171069b6f9586269a4d5f00fb29e5 SHA-256: a930636cf96e73636c6da79ace2067e0e2f7a55a68517ab7ed2361619a6582a2
96 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs that point to suspicious domains, suggesting it's part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/wix?keyword=when+you+reach+me+pdf+free+download
    • https://nenejafaf.weebly.com/uploads/1/3/5/3/135393494/4fc3f18f0.pdf
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/cdf689f9.pdf
    • https://jejegufixi.weebly.com/uploads/1/3/2/7/132740716/numakapebivamav.pdf
    • https://cdn.sqhk.co/letijefa/igLihRd/melerafe.pdf
    • https://static.s123-cdn-static.com/uploads/4530151/normal_5fdf703c88083.pdf
    • https://cdn.sqhk.co/jagibuvat/jbkijkm/835559867.pdf
    • https://wesaxewotivaf.weebly.com/uploads/1/3/4/5/134578523/35b54962.pdf
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/pamit.pdf
    • http://zakosemej.mypressonline.com/davigij.pdf
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/5aa9d.pdf
    • https://cdn.sqhk.co/tezofugowura/idhjDhc/madizoterozubilon.pdf
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fe8f4a72fa3f.pdf
    • https://static.s123-cdn-static.com/uploads/4389352/normal_5fee1d92c31b2.pdf
    • https://pezimanazeto.weebly.com/uploads/1/3/5/3/135309923/7f92c5428d.pdf
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5fc8b422d2c59.pdf
    • https://wedodoto.weebly.com/uploads/1/3/5/9/135993452/fawuvixubiroz.pdf
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/6120096.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/83401f69-c933-4b06-bbb5-0b622e1e9e26/what_is_atomic_mass_in_physics.pdf
    • http://wotidupodugi.myartsonline.com/jon_duckett_html_and_css.pdf
    • http://nivuzujanux.myartsonline.com/gopirodibegupobilituwekir.pdf
    • https://uploads.strikinglycdn.com/files/d3578fe1-3169-451e-a65c-cc3c6b353491/mastering_data_structures__algorithms_using_c_and_c_free_coupon.pdf
    • https://uploads.strikinglycdn.com/files/b7fd253e-b16d-485e-859e-89104533178f/46501189072.pdf
    • https://uploads.strikinglycdn.com/files/a60347a7-cfec-4cb1-9cd6-4563d6196bc3/denon_avr_3313ci.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2df.bin
152e6659899b724110b5d9daac929b04d0075a651a62f0e06282541caf356035		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 5424 bytes
font_01_sfnt_off0000f547.bin
5b743d6226bbbe5e189fc95fa896aa2463f52887bb5d7f8990a88657ead4bd0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF547 11044 bytes

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