Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0a84c045e7b125…

MALICIOUS

PDF

78.3 KB Created: 2021-04-18 20:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 824d2a1833a3201d11625b3ffb3da7ba SHA-1: d6d16ce4bbed4f2566e347426ed55b4e0b696995 SHA-256: 0f0a84c045e7b12584f98f45f2cae4943d1b1e1fc68215233f52f845e5a73a7f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=can+you+export+keynote+to+imovie
    • https://cdn-cms.f-static.net/uploads/4367923/normal_60590c5d3b094.pdf
    • http://tibagisuminove.sportsontheweb.net/82679370666.pdf
    • http://levotavo.scienceontheweb.net/stopwatch_calibration_certificate.pdf
    • https://wenudujajavu.weebly.com/uploads/1/3/5/3/135318124/285222.pdf
    • https://vokewubepil.weebly.com/uploads/1/3/4/4/134443825/5278934.pdf
    • https://cdn.sqhk.co/sazipuvaxiv/aw6jigh/tower_builder_karel_1._16._3.pdf
    • https://cdn.sqhk.co/nunexijezep/blhd91P/49102779597.pdf
    • https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/rafasomesobod.pdf
    • http://legexebe.medianewsonline.com/logugavenotikopoko.pdf
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/509700.pdf
    • https://static.s123-cdn-static.com/uploads/4499622/normal_6002558c6a560.pdf
    • https://jateredadiwez.weebly.com/uploads/1/3/1/6/131606262/jokekopepufunuvob.pdf
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/5983877.pdf
    • https://static.s123-cdn-static.com/uploads/4485942/normal_5feb00f32068b.pdf
    • https://vojumemij.weebly.com/uploads/1/3/4/4/134473557/259cf4a.pdf
    • https://cdn.sqhk.co/perukinabe/icgchig/gebewubiligepekuwano.pdf
    • https://cdn-cms.f-static.net/uploads/4420020/normal_60357ba21f984.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fajenadiwizowo.atwebpages.com/bbc_english_grammar.pdf
    • https://uploads.strikinglycdn.com/files/9cf223c3-3616-4fa7-b99b-e3bca657ed74/59232021971.pdf
    • http://ropupifalapoges.atwebpages.com/wopemim.pdf
    • https://uploads.strikinglycdn.com/files/2e387d34-8aa5-43a5-8337-b72d5c0924c5/fulesezifoxexin.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_off0000f533.bin
6e493d1f15d27378b6982805177c19f9ff74d01bff5c7091d0bde4c97c65370e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF533 4952 bytes
font_01_sfnt_off00010607.bin
e3bf0376175c9901df8082211e4c86c739f46de8e48dfb2508a0b0fd31dd8b36
pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 10504 bytes