Malicious PDF — malware analysis report

Static analysis result for SHA-256 2475ce73b466d371…

MALICIOUS

PDF

79.3 KB Created: 2021-07-02 23:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f40ef312760e80638a3b9c92822b8570 SHA-1: dc538af473b910a048affb794f8df958387ba6a4 SHA-256: 2475ce73b466d3710c6ba81fe7b9823a0cb4037b88d1b07f76ac04f153339564
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious or phishing content. No scripts were extracted, but the presence of multiple compromised domains and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://boumqueur-edition.com/upload/fckeditor/file/43981195981.pdf In PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/a2dc989866a538bad25f027f634d1639/32620105263.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/wigofulijifixoxatiku.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/gevufijiga.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/37316211287.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3c544df82be595471242dc8228d2b8fd/xevifaravuve.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074adc333fe5---9791166748.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/63477859225.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/488cf5ed28b2405472f18a580470e4ee/9030833897.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081555c657cc---badun.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/3401cd3682f9b6b7f7ae85c01a291da2/zolebe.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609572ebb98f1---74234920369.pdfIn PDF document text
    • http://sparkpro.lv/content/file/82899650825.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/b2ac2a7454c8e5e856e74254342512f6/kewowuson.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/bifibanirunam.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/bfb8d5a785678b7ce6bf0d0e20467f9e/84136998238.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/e26745e37cc73e931939b65bcd0e29c8/rabanigifalatew.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d5aba610755---39915315974.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967b46934a5---sutadazepomisagibakefox.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863c2f1bb02---nisanetivej.pdfIn PDF document text
    • http://merwepizza.com/upload/file/24732015249.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbe1025b87---69745995565.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bffdbe9f97da3dd95fe06511af4516b3/vobelufob.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/36651337880.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607227f524ba3---mefodujotazuxelemofanus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=null+minecraft+storyPDF 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_off0000d2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CF 17012 bytes
SHA-256: cb462b74a5c89773f128f3de64918741a5ddcb0f94f637380f630bcd287d4c89
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11771 10688 bytes
SHA-256: 8f43705e4d63c8953780df3b9a2cfe6afd964ace67337453f7d799887e53ee99