Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7e780f4cee2802…

MALICIOUS

PDF

81.8 KB Created: 2021-09-17 16:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7c9106895dd4934450c2105fedc8e9a4 SHA-1: 6c155a5e70e42f1d70832454670fee859129ea0e SHA-256: dd7e780f4cee280297cb30e252e60302c8ec3bdd9c3a27420faf8705eb0d0067
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and a link farm pointing to potentially compromised WordPress uploads and disposable hosting, suggesting it's designed to trick users into downloading further malicious content. The presence of urgency lures and download buttons reinforces the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 9

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://sedefartphotography.com/resimler/files/wezezebagajexikikoneroj.pdf In PDF document text
    • http://imaginove.eu/data/Files/nodijemefobine.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/todugufofudetovovujowiva.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/lituvemuxebututizovuzimij.pdfIn PDF document text
    • http://gyuco.com/uploadfile/files/20210911_092908.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/47034198072.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/39328502336.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/19353773774.pdfIn PDF document text
    • http://epmachine.ru/d/files/63177116072.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/guxaxufepexa.pdfIn PDF document text
    • https://ikansambel.com/contents/files/fomomizalamabinujodav.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/44619771046.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/54005737611.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/38f21f790f9d2c266baf9fac662c2377/22856073454.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/76037308842.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/2889c155adfd68fc80f12de95062e139/vetatawilelusoxakogurija.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347fe02d938---821765420.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/tilewibike.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/80292162527.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/badiwerivuvu.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109110914083250.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/30056262033.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/47744496485.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/sunegozuxedona.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/86585521826.pdfIn PDF document text
    • http://orosweb.hu/userfiles/file/patutudedix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=download+tomtom+homePDF link annotation
    • 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_off0000d932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 10240 bytes
SHA-256: cbb7e020fe50f2259fcab2a40fd30b64403617f1c4f3672e3b84daaae9e15741
font_02_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 19156 bytes
SHA-256: 9352c4b669d09261e860ffbd3f309a917e819df3b2a64d369b0456a319f58ed4