Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d22892290f9b94…

MALICIOUS

PDF

96.9 KB Created: 2021-09-15 16:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 75dc473b741b05c04a6777207555d822 SHA-1: 2f23f272aa07a6f82e686259a2699707233ceaac SHA-256: 34d22892290f9b948efb48e7e70d1bab65f2451c169c8199fff5d59586fdf66f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URIs, many of which point to disposable domains and IP addresses, indicating a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure suggest an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://inwebjor.ru/uplcv?utm_term=fortnite+season+3+chapter+2+battle+pass+skins PDF link annotation
    • http://52963566.com/upload/file/202109122147269926.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/misipefomejilobo.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/86771938565.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/46721885746.pdfIn PDF document text
    • https://businesslife.com/content/file/38791032174.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/xewegokepadeku.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/xemerifaxinus.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/87570937942.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/77410654735.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/nuvoduxotajexegakoki.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/waradatogukogowamusetojaz.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/23856156115.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/nowosujojalefivaro.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/mafupoku.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/4175929742.pdfPDF link annotation
    • https://justbuymeds.net/userfiles/file/futawubupopewow.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/pidekegefim.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16141beb10434d---rekudukafadozi.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/90662372567.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210904085849.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/fibijanavoverusarume.pdfIn PDF document text
    • http://premo.at/userfiles/file/10785907773.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e69a6a89ca---72283688711.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_off000115b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 10972 bytes
SHA-256: 1230e0a4d21f9cfe433bf6158f53360f64a9fad7199b26c9e6ac9e321f614cab
font_01_sfnt_off00012ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14705 17920 bytes
SHA-256: 4a905a1ed7e99999d2fa086bd135c2c4af773e7b2ef434b3a9ff3dcd7e63f842