Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22135d6f62be37b…

MALICIOUS

PDF

81.5 KB Created: 2021-08-18 18:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d665ec5a7a70ee7b91c881cce4fa8c2b SHA-1: f12de7619f091a2c636337c56891584fbc8ee0a9 SHA-256: e22135d6f62be37b2b475db28fcd9e4b4be67486e3d50f1af06f5da8908124b9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it likely contains an exploit. It hosts a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute malicious content. The presence of a 'download' button lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=behavior+intervention+plan+template+free PDF link annotation
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa1fcdeed3---leweloximelukefexagikukes.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3167e005e7---27354363718.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/54024338821.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/85b5be58fc9fff25ede6875208627087/zelolozumafoj.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/18975026319.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/sisuwubeseni.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610061e383c8d---nijojin.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3a7fd8eeb---29459698565.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/6c7ded804ecc1b7fa0772c839d545bdb/47213630225.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd595ca280---34971556499.pdfIn PDF document text
    • http://demkapi.com/resimler/files/32749719601.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b392ad025e---19600025657.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5eb2318d33fa68c6628c91a74320941e/voberimurimemitumitij.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40acf51310---tefeb.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/lorudifaxasin.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/jixozafesomafop.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f55c0e04e29---39592859348.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/16502956904.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/mejobumutofewerilew.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/wapizuvumipapujutisadog.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/80215903640.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/49cqhnimdqi09na81m5o0d0q3d/40313629585.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/kowek.pdfIn PDF document text
    • http://iworking.vn/uploads/files/68746959220.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/kanavapadetatugawerusufud.pdfIn PDF document text
    • http://synphabase.ch/upload/file/fadosew.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/panuwozamemekarorikiz.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_off0000dda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 16372 bytes
SHA-256: fd4c3e980aba8c6be49ca1e73de7994bf9b223aa00786f1ed96edf9f5b7f4051
font_02_sfnt_off00012039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12039 10576 bytes
SHA-256: 08193ba7bbe7337ed7ccf9c2b3fcd49ec4cd0be6636d4054af3db8be1624340e

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