Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af7ba928fef1ab1…

MALICIOUS

PDF

77.8 KB Created: 2021-03-09 15:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 39e56e8953c562131ce97b4a44f473fe SHA-1: 7b3035464ebb314ba4d4bde05ee689157bb48444 SHA-256: 9af7ba928fef1ab14a9da8a1e83663c1e0d53f423eb31355a6a2952723a7f781
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, directing users to potentially malicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=airbnb+separate+rental+agreement PDF link annotation
    • http://freshka.fun/fugolesefixagamigufibifr9uyb.pdfIn PDF document text
    • http://sexedate69.site/6th_grade_math_worksheets6kd3s.pdfIn PDF document text
    • https://lolijizaw.weebly.com/uploads/1/3/4/4/134461821/5510386.pdfIn PDF document text
    • https://finoritibad.weebly.com/uploads/1/3/4/4/134468058/f9cd13bb5f27.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/299e7.pdfIn PDF document text
    • http://zzzmmmmejjj.space/xumetupufonapeu2zdl.pdfIn PDF document text
    • https://siweporabid.weebly.com/uploads/1/3/5/3/135345409/gavabubeg-kebagubilol.pdfIn PDF document text
    • http://ita-bio.fun/classement_coupe_du_monde_rugby_2019qzg8m.pdfIn PDF document text
    • https://wavupuzubeje.weebly.com/uploads/1/3/4/2/134235525/342d20.pdfIn PDF document text
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/407568.pdfIn PDF document text
    • https://fojawejor.weebly.com/uploads/1/3/4/8/134886237/tiwosigexedogizavak.pdfIn PDF document text
    • http://lighterusb24.site/lic_agent_report_form_3800h3ba.pdfIn PDF document text
    • http://extrameets.fun/32140815859f2r0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gudukupir/roll20_character_sheet_templates.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_9b20eaddf8a9465b984dbde263da68e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/8876613059.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/free_fortnite_account_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/kenmore_110_washer_not_spinning.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_d0abd26715ca4296ad1ae706e1305c8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lawakux/43974459974.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_57d152c1d5c64850ab26bfe0dc0d35b9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EC 4944 bytes
SHA-256: 8a69ef7a66b113a181017792d78a897aafc3602d3d59c05645a2ad81d87d2c92
font_01_sfnt_off0000f88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88D 10264 bytes
SHA-256: 330a14187b84611c8b3e0c534db1751848ecfdc56b9238f92553414dd4472d52
font_02_sfnt_off00011bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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