Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8779da1b0ee8ce6…

MALICIOUS

PDF

222.0 KB Created: 2021-03-17 09:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 152dcf852439ebb61a49662f83b64f0c SHA-1: 9cc444ec79ec2a9d4d4d74e273e5ef8df8df4828 SHA-256: c8779da1b0ee8ce67dd6f0cb598215ebb0daa588a9aa14820b93990396291f96
104 Risk Score

Malware Insights

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

The file was detected as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a suspicious domain, coupled with a visual download button lure, suggests the document is designed to trick users into downloading further malware. No scripts were extracted, but the PDF structure and external links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/wix?keyword=evidence+for+evolution+student+worksheet+answers PDF link annotation
    • http://nidewopovuwubo.mypressonline.com/what_is_a_family_assessment_tool.pdfIn PDF document text
    • http://inostrana.com/87088536948g5phe.pdfIn PDF document text
    • http://my-credit.info/weekly_calendar_template_with_hours_excelu04ld.pdfIn PDF document text
    • http://helpforteam.com/az-300_dumps_free32p8d.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/financial_accounting_journal.pdfIn PDF document text
    • http://2220202.ru/amantele_trecutului_volumul_1q5xnf.pdfIn PDF document text
    • http://zhk-rekord.info/708799413878lt4c.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/rudesefas.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/somonosoritotunesel.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/joining_the_conversation_3rd_editionp9h52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d1c779-6cfc-4308-a5ec-776fbb8fbf79/leadership_secrets_of_attila_the_hun_review.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_552ff8a338664b1d98bfaf8786b9fb83.pdf?index=trueIn PDF document text
    • http://bexiponezewan.rf.gd/sutofaforafuwawupagitasap.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_577dad6302114994bbfb7edf07ca374a.pdf?index=trueIn PDF document text
    • http://latujetob.epizy.com/reluximakelugabeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d89b95d-4b5b-4448-a36f-00e5ff6ceb26/xovuxovibizosikalena.pdfIn PDF document text
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_eaa2c08b91d54a1f9658118dfc2bc3ad.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_fddeb84083e74500981e4ad68f7c415a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64eed78-5ff5-4611-bdc2-1805f5503bf6/jedewugodajonus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31ADC 5280 bytes
SHA-256: b8cedbf9a3c9d8904610b306fabb4b055e32d5aebc21c778a91c637edfcbf536
font_01_sfnt_off00032cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32CEC 11560 bytes
SHA-256: a2d191313ff033a32005a826a4d44090da1d0abc1136e290858a90234d928576
font_02_sfnt_off00035462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35462 16088 bytes
SHA-256: c8cad0fcbf711734ba90d1bf0f33d5774ae0d43a5fc07b95f2d0d23150af1919

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