Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54a5c2a4ba87862…

MALICIOUS

PDF

69.1 KB Created: 2021-10-01 06:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 897e205e05ff5604136f8e08b54fd929 SHA-1: 1fb1e49d638825420bc82d9143b761194674a55e SHA-256: e54a5c2a4ba878627e55bef89f0b034169e76e5f8c61724ccf4ee6d57ad6b835
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a high density of external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF's structure, with minimal text and a focus on images, aligns with a common tactic to obscure clickable elements that likely lead to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://lejuriste.ru/files/file/67769579722.pdf In PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/votuzin.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/18626729880.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b77f975e09---zupuzaxopizupilaxexakateb.pdfIn PDF document text
    • http://adice-area.com/pictures/files/tanenaxozetovesivaxesoz.pdfIn PDF document text
    • http://adriennemason.com/assets/files/59905476020.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/34918024165.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd34f833cc---silogenizim.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/taxokuwigazazukaxejiku.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/95642714004.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/zaperixuw.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/161411c2ae7acf---pesimupugoxebejaximusiwu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a39d37773---68655676400.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/12563309894.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/92319021639.pdfIn PDF document text
    • http://nanopena.cz/upload/file/bukadijanexuzawapapaf.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/woxuboxomifunibim.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/61028198600.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/zoweduvidexe.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/48344678275.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/48563535835.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/zimuzimovidupulajakalam.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/tejuguxutikanukalufipin.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/xuduti.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/tavasosibufatokanedoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=azar+mod+gems+apkPDF 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_off0000b344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB344 10528 bytes
SHA-256: 32a3c13899fbf21a80355ccc02758337f7f0d8cac5c5cf83e624492e8a130854
font_01_sfnt_off0000cb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1D 14168 bytes
SHA-256: bc348ad49ee47636ce665dc9e6ea6b864d6822f6e99d5ef9494800a4f39b223a
font_02_sfnt_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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