Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddf6abce7b1da36…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 13:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f8a744b0382ce216d3ff7aef0f15f5a5 SHA-1: b9330a4b9b207b51b47d64aff5b99e412ddf13da SHA-256: 2ddf6abce7b1da368b07d08a6bca65b48e34bbbeea71a231f63bfa999b6a49e2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs pointing to various domains, many of which are likely disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pistant.ru/uplcv?utm_term=all+beyblade+burst+turbo+qr+codes PDF link annotation
    • http://vocal.bpv.su/content/files/files/guwegedarediluwomosapi.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/deluxofumikovurubavu.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/watoxikomukil.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/98297188784.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16136f1330784a---41058566641.pdfIn PDF document text
    • http://realestatemiami.com/userfiles/files/1714904045.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/balobup.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/zavikikezo.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/poxijigurufexigasubuxago.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/xomizof.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/26312989496.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/31536942768.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/20953951511.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/musaxefafow.pdfIn PDF document text
    • http://artio.pl/files/files/26200004210.pdfIn PDF document text
    • https://academiapreprod.riportico.com/userfiles/files/54111304851.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/digojoravapofebe.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/kojubovipekigovame.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/14864200886.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/28675941172.pdfIn PDF document text
    • http://grandfiltr.com/files/file/31044598143.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9ca32b994---soleliwatutifopegar.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/torakamifojodubip.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_off0000cedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 10648 bytes
SHA-256: 33e8d69a4f76279f7ffe12b37f2eb979587b626faebcbedbcb04fc51aa6e206e
font_02_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 21740 bytes
SHA-256: ed9f861fab3c2be37a6ea06f856691b40eb45fbfba08bf1d5488a1f4f85a34ea