Malicious PDF — malware analysis report

Static analysis result for SHA-256 360e6d15be5a3140…

MALICIOUS

PDF

88.8 KB Created: 2021-09-04 22:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fcc087469adc1596e9494acda05424f6 SHA-1: 18ad391cdeff89901af4dfa8804c922f3125d3eb SHA-256: 360e6d15be5a3140f65c4c664133074f003c5d390519349fb229bce32b587718
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=intelligent+security+products+time+attendance+manual PDF link annotation
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/dc069l20kpd4roe6v5shkad5sg/zutovadurule.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/miriwovuduxusigew.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/ddf9f38584b597caf6d319824af45f92/52049073240.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/817f54eb39397a7086a0088631956a7d/5225487218.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4d7ca745---92036564791.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/93458032070.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089d33b16958---fabozemorefawi.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/54862302084.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/86212251703.pdfIn PDF document text
    • http://slsnn.ru/content/file/82047088761.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/63d1c89a81a19778b13ffc47fb748b01/mumimunabajogo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3fabe82c487e24fa962b8fca8da6c563/74911782618.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/vamaxunux.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/e1b3764o7pqfvvbl343vbdr3ou/bagosodisigivik.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073601ec5f2e---17899143718.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/39162467838.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/doreduz.pdfIn PDF document text
    • https://tonitomov.com/picture/file/givasatevezakef.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609625fc38cd4---xunotagobuk.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/dopekaderoxe.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/29107329066.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ceb9451f8d---54072782561.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/mp28pmt2stmn8788ppv5840244/tovetejazodaxil.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://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_off0000f105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF105 19452 bytes
SHA-256: d7b1734e50a7c3aa8bb9fdd71f306511f770cd566abe6a7d7f93b98a87c4eec3
font_01_sfnt_off00012391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12391 11020 bytes
SHA-256: 16492bf7be5b26aef4673fd8b4f3b6e91e12a0a31a8da6d6a23020f6b0d1a3a9
font_02_sfnt_off00013d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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