Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee47ca1b786f9be…

MALICIOUS

PDF

83.0 KB Created: 2021-09-12 22:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 585376a90447789169e0be8cd2608ab6 SHA-1: 6b4140fc8e27fc4bf13de4cc369679e103d91ce0 SHA-256: 5ee47ca1b786f9be074cc4f1aeb47b077b6725c69f9e446501f88a375c1b295f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. The presence of external URI heuristics and the 'PDF_SEO_DISPOSABLE_LINK_FARM' firing suggest the document's primary purpose is to redirect users to potentially malicious external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://geometramaurotozzi.it/userfiles/files/zedaz.pdf In PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/01f4ea01f15c8d4142575e81e2c07e0a/84096010141.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/86488762264.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210912_162759.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c6094f562---4840497288.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/nawisukovata.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/24583018113.pdfIn PDF document text
    • https://laser123.com/geektic/files/90753451210.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613377b1213dc---28898051590.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/vofalikejunujuvu.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/61298271200.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/73010873217.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/dibipopuxatotaxexeruwalir.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/lusobezifukudejixunenuw.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/68471559748.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/xemezepuju.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/98055531799.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/taduribi.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16135edc7261bd---xotazomuzonowalepuxakas.pdfIn PDF document text
    • http://autovoda.ru/upload/files/devebevuroxetaxab.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/pimadusuxitenurisija.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/goxuvotevikuviwijuw.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20995242846.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/puzanawexesi.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/wavoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cambiar+fondo+de+pantalla+automaticamente+androidPDF 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_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 18012 bytes
SHA-256: d99d1deac06d46d9a6affcdb4d933230a615dda9d7de5b95fa8fdbfd27637e5e
font_01_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12506 10884 bytes
SHA-256: 2cfff1a9ce96904326bad11df19b647185e45d5eee3b9821b43e1f90844d58a2

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