Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b213d71062cb95…

MALICIOUS

PDF

89.8 KB Created: 2021-01-20 23:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f6a386d417680b7de189614a29e3d3c8 SHA-1: bf995dc0eb3d8cb81ee66b2b6c3343c02324c177 SHA-256: 20b213d71062cb95da8a82b8cc929d7aaa9d9749d9d9d1deb284328f0da6b512
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one prominent example being 'https://cdn.sqhk.co/tefulobesa/jfphdMt/gumub.pdf'. Another external URI, 'https://traffking.ru/123?utm_term=boston+terrier+boxer+mix+full+grown', was also extracted. These findings suggest the document is designed to redirect users to potentially malicious or phishing-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/123?utm_term=boston+terrier+boxer+mix+full+grown PDF link annotation
    • https://cdn.sqhk.co/tefulobesa/jfphdMt/gumub.pdfIn PDF document text
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/rikomogi_busapused_dineminonasobel.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/5310501.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/cghigij/aerofly_1_flight_simulator_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/T13IGeK/diy_bookshelf_ideas_for_small_spaces.pdfIn PDF document text
    • http://pozesex.iblogger.org/airplay_pro_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/MaefShh/3963986499.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/wegugus/google_sheets_export_as_csv.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/kolimeganazuvijama.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/jozanitufezozijetofubezu.pdfIn PDF document text
    • http://xawavejemefo.epizy.com/sexabejuzorufegevev.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/xagaxolos.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/pulse_secure_vpn_client_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/1879259743.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/bunch_of_thoughts_in_marathi.pdfIn PDF document text
    • http://zukavinu.rf.gd/wia_canoscan_lide_110_software_free.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 5224 bytes
SHA-256: bdcae1a31a577da18cca955a12afcda3cb52f5d73c962277cb53a2c03278cbe9
font_01_sfnt_off0000fc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC31 8156 bytes
SHA-256: d8f5be7ece6a9d91f0b391d1468fd56c679ba1bb9bebccb31b5b7b18219b7695
font_02_sfnt_off000116e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E4 10660 bytes
SHA-256: c7b2ff89f83799056a57bcc632b9394afe0ecb2c0500bedff69c744ccf3c1ca0
font_03_sfnt_off00013ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA1 16512 bytes
SHA-256: 364804aa7448372cc7c97ac917e2ce0144dcda718d8e996f104d98f59e273a95
font_04_sfnt_off000151a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151A2 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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