Malicious PDF — malware analysis report

Static analysis result for SHA-256 12196867f25920fb…

MALICIOUS

PDF

84.4 KB Created: 2021-09-02 09:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fed077e6aff4a568022097d8361a259a SHA-1: 8ced77837bb9b6334a6aaabf3f89d7132e843cad SHA-256: 12196867f25920fb262fed051ad8d353095e333a3411b277c1e6e75c6cd7488a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure points towards an attempt to lure users to malicious sites, likely as a spearphishing attachment.

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 https://drafthe.ru/uplcv?utm_term=april+fools+pranks+in+text+messages PDF link annotation
    • https://ntwbearing.com/UserFiles/File/joxeginexibawibizuxa.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac4adc4fc---durama.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/eicc7fjpo4uuta5b21bq255pq1/4506067091.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/kiwafutolamup.pdfIn PDF document text
    • http://millecolori.it/images/file/60094265834.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/mebefedajeg.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/7806df69932e778a04083e9e404ebe13/37309655872.pdfIn PDF document text
    • https://promise-land.com/upload/file/rewoxalozimapapuwefa.pdfIn PDF document text
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/pokogitefivugupav.pdfIn PDF document text
    • https://fallsplat.se/file/xiwineluvisujimakifim.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/39399486720.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/44490901235.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/765248192.pdfIn PDF document text
    • http://firegallery.ru/img/upload/reruviwasu.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/fojetujutejolitabogajot.pdfIn PDF document text
    • https://mackbeks.com/files/file/pabomubipumivorudo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608f2003006a7---87587406965.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ed18bacae---fojuj.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/fadulafodeze.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b445b21ef59---zigiwigobekaresu.pdfIn PDF document text
    • http://vhktn.at/images/content/files/36313471514.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/68965433128.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b2c99d69fc---94759936634.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/65995960114.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/gesux.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_off0000e1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 18688 bytes
SHA-256: 9dfa27d9795ef9b64557bfc1e77d58ed09749739235a62ed06e6f246367cc16d
font_02_sfnt_off00012ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB9 10876 bytes
SHA-256: 20a91002f03dff405b56abbd3ef7ff1548a9d3eb128e8bce96550a845970456c

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