Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73708393d2c85b4…

MALICIOUS

PDF

144.3 KB Created: 2021-05-05 23:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7fcfd3257b7a4341378f49e99326deec SHA-1: 21d844e0453cd1dbc2357096fac9e15066f4be06 SHA-256: d73708393d2c85b4b3c7275ad6ae2643831e0652db91b21b137e98e560d8cf3e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While the document body is heavily obfuscated, the presence of the external URI points to a social engineering attempt to trick users into visiting a malicious site.

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://gimoguvi.ru/strik?utm_term=introducing+second+language+acquisition+2nd+edition+pdf PDF link annotation
    • http://tokepefanoxite.22web.org/48424622273.pdfIn PDF document text
    • https://jiwumakot.weebly.com/uploads/1/3/4/2/134235931/a2a51e78fdab0.pdfIn PDF document text
    • https://wovugijewinekox.weebly.com/uploads/1/3/0/7/130739614/59d3644d.pdfIn PDF document text
    • http://sexedate69.site/vaxoxozetumam91od9.pdfIn PDF document text
    • http://top-salez.site/415089811070mudn.pdfIn PDF document text
    • http://nowtorrentz.com/fixotelemebapogavetrrmf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_606208276fcdc.pdfIn PDF document text
    • https://pupokidam.weebly.com/uploads/1/3/1/3/131381904/be2804e.pdfIn PDF document text
    • http://autoupgrade.website/79696752480b6207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_60109057c0603.pdfIn PDF document text
    • http://bitcoinov.site/asus_rt-n12e_wireless-n300_router_reviewr1s9q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/43f74fc0-8a56-4351-92f9-28e069fb1b69/guxepizuno.pdfIn PDF document text
    • http://bagitokukuwulo.epizy.com/dokopurubakoxubogujo.pdfIn PDF document text
    • http://lizukupavokupip.rf.gd/the_aeneid_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/18781403074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0a874d-44b4-453d-b3c2-5754ce0a0c54/epson_xp_620_ink_cartridges.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/93901475231.pdfIn PDF document text
    • http://juxawewoguseku.epizy.com/somejavigutenuzavijake.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/kebomogobiloxizedepozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7113a3c-04e6-416a-9e94-59d513798be5/casio_aq_s810w_1avef_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/pimufeperuge.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/gazonodujonuvoxasud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA62 5400 bytes
SHA-256: 767e9d36c4ea44c5b90664f3964ee029ffb5a5dc7e69cf48d75d3ef72101888b
font_01_sfnt_off0001fcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCC3 12248 bytes
SHA-256: cb5710a1610947225c15fea8077fe740b84e876aa58cd270a21fa57b7527f2d9
font_02_sfnt_off00022510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22510 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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