Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f87ec099290c2f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-13 22:33:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 1620e864f7068e207d97360b1afd877a SHA-1: 6dff0c9b6b5476062193d17a881e399c2c45acfd SHA-256: 61f87ec099290c2fe95ed2ebb8a456ea07e92f765942f5653d08cb09b5beafca
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing attempt to redirect users to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/wix?keyword=oregon+drivers+license+test+study+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467287/normal_5ffb6fdac5b22.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/hhigk7T/jukiledufubevij.pdfIn PDF document text
    • http://rejonanujezeke.22web.org/zufefowenapilopuxenixifuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464850/normal_5ff8851f029cb.pdfIn PDF document text
    • https://cdn.sqhk.co/konosoka/ggjghjg/pink_floyd_breathe_run_rabbit_run.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/cerebral_palsy_rehabilitation_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491412/normal_5ff140c1cfcbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_6004b2070a0dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460476/normal_603faf8d87277.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/jcSdggo/95345449565.pdfIn PDF document text
    • https://cdn.sqhk.co/kesumixom/vje5lii/23156210899.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/xebuvuwov/simple_past_verbs_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f6e6eb-9714-4b58-b05a-c8f479c1f6b0/can_drinking_cause_belly_fat.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/wabetopukakof.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/harvard_business_publishing_marketing_simulation_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0db85c-c861-4bed-9eab-8d1da7310e7f/is_boston_market_open_on_christmas.pdfIn PDF document text
    • http://nonulalomijowo.epizy.com/21882853480.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/figefivanelabowufejakewuw.pdfIn PDF document text
    • http://munakazoxan.epizy.com/42697644290.pdfIn PDF document text
    • http://mupelaj.rf.gd/geduwadenaluxidor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa92776-a358-4dea-ba39-ff67517b1463/what_is_learner_centered_approach.pdfIn PDF document text
    • http://bapiwixobenilax.rf.gd/42896350056.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/58501436711.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_off0000f4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 5088 bytes
SHA-256: 3a43906d5d6d2f498ff8e4db08458f7d4fec538d5cde9fe0f615831aad270595
font_01_sfnt_off00010657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10657 11308 bytes
SHA-256: 8b7fde74753ea763ff36b59a1dd1761c7c05668b992ec0a1cf2abb6c2217dd80

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