Malicious PDF — malware analysis report

Static analysis result for SHA-256 073365c2455c21ae…

MALICIOUS

PDF

70.2 KB Created: 2021-09-14 05:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 68e6444f90f648a996610b141667dfba SHA-1: 69352c095c2fd9ac10b4248805b1a3be045a287f SHA-256: 073365c2455c21ae6513b85d6d3f96bb29b5d5ff4663349457c2a32886ed53a6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The PDF's structure and embedded content suggest it is intended to lure users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=accepting+appraisal+letter PDF link annotation
    • http://fabriziocar.it/userfiles/files/buxej.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/bepedixajedopixuru.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/sodud.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/34258369608.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334a050dfd4---xonirapovebeseluvavefelon.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/tubedifovimetivut.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/dasilobitemulemek.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/fozubixibibun.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210909172547.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/98874556138.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/0e95c366706509cdf86a42283c7220df/zagob.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/39800258421.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/88052612864.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/milakaxerubusit.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210909080155.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/86076187170.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109051501235338.pdfIn PDF document text
    • http://h1t-urlaurora1-turbo.com/contents/files/dukofevib.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/kikugoxagafoposexux.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/fulad.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/13459536657.pdfIn PDF document text
    • https://33mobility.net/uploads/files/toguzavegewomalupude.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/givakixipazivutagunofijox.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_off0000b51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51C 10412 bytes
SHA-256: 65bdb76ce23668c2a80c1d4369d4a30ca997acafadaf104e44d3667f03cf05ea
font_01_sfnt_off0000ccd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD8 15084 bytes
SHA-256: 98971d97786f136e438c7d50aa433ae4f504230d5da3ae2deed1da94b7074496
font_02_sfnt_off0000f2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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