Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d799737a25f70d…

MALICIOUS

PDF

265.5 KB Created: 2021-03-20 16:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: b83305bda3e0e2d9744a69ed5a948163 SHA-1: 5278427bc23db08f61bd582c42f303a22fe35a69 SHA-256: 23d799737a25f70dededbfaaa4bf0ffd0994c70f72e23b1c3bf4ba85c8f6ce2c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into clicking on a link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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://soxebez.ru/award?keyword=artificial+intelligence+norvig+pdf PDF link annotation
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/f3a9e825889c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fe15f1bc03fd.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/linear_z_wave_garage_door_opener_not_working.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/dibude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_60236499a4c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_604ed47c40e62.pdfIn PDF document text
    • https://rewojomivatal.weebly.com/uploads/1/3/5/3/135345623/3481746.pdfIn PDF document text
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/retesedeb-fuxejufivavuwu-nobuxe.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/49979775063.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/c9b3fc783637b59.pdfIn PDF document text
    • https://sivitudogadix.weebly.com/uploads/1/3/4/1/134108631/2901be76819d.pdfIn PDF document text
    • http://xifutipixa.mywebcommunity.org/50844472666.pdfIn PDF document text
    • https://rutikaxa.weebly.com/uploads/1/3/0/7/130738846/5474249.pdfIn PDF document text
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/738571f48b781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_5fe89d023854a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fddae5cb50d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_80a2ebccc1a1451ab79e1815166bb048.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_00d1add4ed4746568686a1d80b30d620.pdf?index=trueIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_760ed6a6852c46e69684f18837f69bf8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/laboxiw.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_a589978aba684ef28400adc142c1d02e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/vevako.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/yldz_holding_annual_report.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/cfa_level_3_topic_weights_2019.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/78969116802.pdfIn PDF document text
    • https://1a899ca6-11bf-4464-971e-4bf0b885e765.filesusr.com/ugd/4ac3ff_eaaf28f20f264d5bb455bcac8d26c433.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003d633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D633 5192 bytes
SHA-256: edb998ba7164f1db8df2071d08cca616ee4aeee4a687e8e94d5c76439ea39c94
font_01_sfnt_off0003e7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E7F8 16844 bytes
SHA-256: 98c39d288a91debf6ddbff573ac062eb78078dfb8b0c56243d2ac4e9a1122221

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