Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b89d4a7085e0438…

MALICIOUS

PDF

79.2 KB Created: 2021-09-16 14:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 04de4e342adbd38a431aeb2789d94ad3 SHA-1: 7cd79aeff09bc6db9546fcca05d456264d49a1dd SHA-256: 2b89d4a7085e04380da36b1e84f941c99f4e78c8fca35c78c2573a6f92bfddca
206 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including ML classification and specific lures for MFA/one-time-code harvesting and payment redirection. The presence of numerous external URIs, many pointing to disposable hosting, suggests a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and the nature of the lures indicate an attempt to trick users into providing sensitive information or initiating fraudulent transactions, likely through a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://wastran.ru/uplcv?utm_term=clash+of+clans+2+accounts+android+2020 PDF link annotation
    • https://albawadiroad.com/userfiles/files/megowifedoxofezanukitike.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/34982884910.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/refofisorexomufikivebe.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613675090d010---fuxujow.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/48255cf01c9dca47816921b08c0e0d53/vosedowupidoxoruvane.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/44608970932.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/neganin.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210912_115633_200.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/81253676041.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/1313442055613d42f28cf1a.pdfIn PDF document text
    • https://majubesar.org/contents/files/divejatutubevitovugizofa.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/pitaginukujulutomewa.pdfIn PDF document text
    • http://oodow.cn/upload/file/210906185418735820o0g742pkje3y.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/foruzemuvokojufapubutemu.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/xurubupi.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62897615616.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/21127859616.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/55612778465.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/47020527178.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/90053174081.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/65059732214.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210910234444.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/konenisim.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/kawonazesapanizededuma.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/71348820275.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/losusolarigakaw.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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 10816 bytes
SHA-256: 3588762ab6cc604148b7d4617a480b546250ec4180e5f32a548ee6e1559c9a0c
font_01_sfnt_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 18068 bytes
SHA-256: a54867c7a85f5e69500838399c58b53af8fe6a78bd0bca66a788a1538f5b5cab
font_02_sfnt_off00011664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11664 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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