Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2654cb21ec86c06…

MALICIOUS

PDF

81.5 KB Created: 2021-08-24 00:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: da9c0b18739de1239d29880e1aacb778 SHA-1: fcb6d778ce374fb84285d8916aaba4d879f31aa7 SHA-256: d2654cb21ec86c064d033f252955a43d0c711cc7ca622b3d93ec563903724a46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the overall structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d226eb17---bezazenatomexome.pdf In PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/gelaxagemobemipevefozuxa.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e09aaffa---zojoroxoloki.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/serozonezapa.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/ttsrm7he7atn9qo8a17qha63ec/1947167941.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e35f69c6eb861ce0e5759598250600eb/wakol.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/wogibuwojekesoz.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/21766046793.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/7a54828433c235b083733895f3d376e2/23818077419.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/oh2tb7hgpcb8i95vnf6pfdbja3/95903106353.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/kodunuros.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/buvupowomu.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/dasixirawodufidetuvipako.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/0c2b59eace28190e217879f0158fd84d/dukukazikurutanosusipowog.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1a8e329a---50932780098.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/kadamovonepofowatizoxo.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/wilujudiwarenajifagu.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/44131857503.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160829ebfa72da---1253665665.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/58ecbeac7fa612f4f5d194598a26c1fe/89922946123.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/58728990309.pdfIn PDF document text
    • http://canvangdientu.com/images/file/96492596150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=to+be+extortedPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 18352 bytes
SHA-256: 16b5746ea57e7e7ad00b43cfd52b5623c9b45b72f192078b7c7035ca5ea81fbf
font_01_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 9876 bytes
SHA-256: 2380e3676bfb66bd27cb1ef4b5111a6a8159c57fb2a6bdecd9a760144cb11933

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