Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed3e8b8d8206f82…

MALICIOUS

PDF

80.0 KB Created: 2021-08-29 15:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 67fcc5d3c081b1d952fa55666205a679 SHA-1: 31ffd83af3613e4d803093ddf7282a48c72e3d12 SHA-256: 6ed3e8b8d8206f82f8a849a49fe0ae760aedc3bafc509221c1ce1f749e57363b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress installations or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=past+present+and+future+tense+french PDF link annotation
    • http://erictex.com/ufiles/files/bajolijedazevaz.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/82679901856.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/523a7e37300f3bd43965e1a31b47ec0b/9898995466.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/08e68f670eb51f899d3af87fc098fa55/68979138610.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/41371866999.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/gulelesutuwuvuvamewi.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/qiaa368r7jesjp7hrrardgu6b2/71553455994.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/ef7946dfa0c6025271e9cfb68e3e71d3/27817598312.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/24705343534.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/pinide.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc957d9749---kukevabizufenemawu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae6545957---70467299161.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/vajirubewogovote.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/vibajoxeja.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/6418754553.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/81666229394.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/649af58f22a7079b9bf94c02059a06ad/72352051415.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160792866b8791---jazitanoxewowugirepu.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/38762809229.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/47727204687.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/xeridoxog.pdfIn PDF document text
    • https://noventa.cz/media/files/file/564263744.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/fidoxatemozapimifilunolo.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/banenal.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_off0000d159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD159 18924 bytes
SHA-256: 82262749c816f0019b2b6f45775afb7d7a9a601ee8d2c57a391e8534dc698a94
font_01_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 10560 bytes
SHA-256: f1e58e2d4a8b118057226330da9ba339c547fb5efd8490a3fecb1270323056f1
font_02_sfnt_off00011a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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