Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda83cf817a4a4a2…

MALICIOUS

PDF

68.0 KB Created: 2021-09-26 12:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e406a92e52684d598a4e4db0f3bc612 SHA-1: 2276a461b2c411a04bd0da4d0fe29f32e35ac354 SHA-256: cda83cf817a4a4a2bb942870e4df5efd8080afed0a30343e8bdd7d48281cff92
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The heuristics indicate it's designed to redirect users to potentially compromised websites, likely as part of a phishing campaign. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 68 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 https://crewmak.ru/uplcv?utm_term=fifa+19+for+ppsspp PDF link annotation
    • https://smshealthcareservices.com/ckfinder/userfiles/files/gogomolixutumajizufaxej.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/zetuxegibomu.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/81778462815.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/bapirerim.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/204886279.pdfIn PDF document text
    • https://sergiomauri.com/images/file/85974078413.pdfIn PDF document text
    • http://klhl.com/userfiles/file/pagiporibowuzidi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5829ef17e---zasejevisoz.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/64531758529.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/51103717579.pdfIn PDF document text
    • http://hk888.edo2008.com/com/comimg/file/20210922_041850_114.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f538c432a4---misapusomelo.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/83367121277.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/vujurasegon.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/12502844111.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161403dd587ec3---vuxexinu.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/mowoturekel.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4edd638b3bcc71c7470cd7ee5817c05b/robazoxobedekotod.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/karakexuxonagizuseku.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6923e5e1e2bc9e4faf4138702da159b2/zebedasalofo.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/44611444572.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/26896317335.pdfIn PDF document text
    • http://93564497.com/userfiles/zezigejovolejelitoja.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/sosegikumunurajekuz.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b63bceufpkro608p7r297cmsh1/bumakedademudizege.pdfIn PDF document text
    • 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_off0000b0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EA 14228 bytes
SHA-256: 756ece07ecc5e088e68e0ccc307d791da5687061b4d5dac9bc2e8b4377dba23b
font_01_sfnt_off0000d40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 10168 bytes
SHA-256: 9c79cddb49daa52ca95fc5745078f30c4023dd876576dff9ce73ccf94011c3b6

Open this report in the interactive analyzer, or submit your own file for analysis.