Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8a53bcf109c85b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-08 23:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b83f64485aa4aa6b114edb6d502a5c3 SHA-1: 54b70294fc852091517eb6ed17c2c4eed723558e SHA-256: 9b8a53bcf109c85b15cda0f0e12c5546cdd63ccfabe9b987dcc9b5c57233212f
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into clicking it for information. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

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://ponafet.ru/aws?utm_term=what+do+the+beeps+mean+when+you+turn+on+a+computer
    • http://spiritstudio.ru/82197497708k8kwr.pdf
    • https://fejajeger.weebly.com/uploads/1/3/4/6/134614243/faxivinizuwufufala.pdf
    • http://rafupofamurawaf.mygamesonline.org/lotufuzosogobafenumojo.pdf
    • http://ranupila.mywebcommunity.org/76451292355.pdf
    • https://laxebuwefe.weebly.com/uploads/1/3/0/7/130775048/1133864.pdf
    • http://zootime.store/wujibogomakesoligamufa9yx5h.pdf
    • http://kuxidubavez.iblogger.org/puwijetapakifubalenami.pdf
    • http://kakafeg.scienceontheweb.net/61091158252.pdf
    • http://shtangennstutkupitseychas.xyz/63477218555k9ju7.pdf
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/329279f1.pdf
    • https://regutipedazuvi.weebly.com/uploads/1/3/1/0/131071249/4646257.pdf
    • http://kigurumi.org/jason_and_the_argonauts_storyz78o5.pdf
    • http://bejuzoz.iblogger.org/antibiotics_with_references.pdf
    • http://situbune.iblogger.org/lukopumum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://manosotidokef.myartsonline.com/pioneer_avh-210ex_reset.pdf
    • https://uploads.strikinglycdn.com/files/71a9be30-f164-4fcb-91a9-25e462816809/juxabalumipalawenajakasuw.pdf
    • https://uploads.strikinglycdn.com/files/6d3b0850-7cd9-4222-953d-ecd31417fbda/beats_solo_3_wireless_gold_matte.pdf
    • http://likasiz.epizy.com/subnetting_explained_step_by_step__subnetting_charts.pdf
    • https://uploads.strikinglycdn.com/files/f6c222e4-f1ce-49db-89d8-cac196efa6aa/8984581179.pdf
    • http://gubadix.epizy.com/pusetujofuziruroler.pdf
    • https://uploads.strikinglycdn.com/files/a2c163aa-2574-4440-b7eb-ef338afc9ee3/88363451640.pdf
    • http://dopovis.myartsonline.com/71336172988.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_off0000e6b6.bin
b28dd487a53881afdb53ea77fd84b83aaad48a912e671d88925446c06750f95c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 5628 bytes
font_01_sfnt_off0000f9c8.bin
c66756349902fe67e73c91035369f5d5be86db960ea48325207dc67ed9122b98
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 10200 bytes