Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9589ef6fc570ca0…

MALICIOUS

PDF

102.4 KB Created: 2021-03-06 21:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 15d6c6ceb8cd6d5b5e89be7adc13f31e SHA-1: e8c0fd781ad5d688a2220678a1fcea0950186050 SHA-256: a9589ef6fc570ca0796b487733f8201664d3db0c80c5b41cad42d237b4d1c2fa
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to a "Louisville ky digital channel guide". The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/wix?keyword=louisville+ky+digital+channel+guide PDF link annotation
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/sixunovijipumanuz.pdfIn PDF document text
    • https://rovisudaguxu.weebly.com/uploads/1/3/1/4/131438800/33f28ff.pdfIn PDF document text
    • https://levevuwakute.weebly.com/uploads/1/3/4/9/134904524/5002520.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/canon_rebel_xt_350d_specs.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/jidagimodusivuxu.pdfIn PDF document text
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/6c0247.pdfIn PDF document text
    • https://xasezufud.weebly.com/uploads/1/3/4/0/134016907/e583d.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/7299649.pdfIn PDF document text
    • https://wiromokuxuzub.weebly.com/uploads/1/3/5/2/135298753/cd88642b00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towakog/3920851359.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/15485058185.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/what_word_means_stormy.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/tetadawudidosek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e19952c-977e-42b5-9467-c11b38959fd5/msi_970a_g43_plus_front_panel_connectors.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/80897682229.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/97204195100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca46780-e78a-4d4c-bd9e-cbd8f7862f7a/madonna_sex_book_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/55383341341.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/cool_anime_wallpapers_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2041ccb-989f-4c8c-befe-c2234e60f2d6/57439144009.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/revenue_canada_2018_income_tax_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7813fa58-f462-4370-877b-86174e284c8a/85048199608.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001558c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558C 5272 bytes
SHA-256: 7f9d8878c26cfcff818fc3bf0585d4256e642378013fcf91661acc3f1c1e3499
font_01_sfnt_off0001678d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1678D 10528 bytes
SHA-256: 4a3e0d7c303c91311f10d068db0de55705712e129a97439c183bdb45ac458519

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