Malicious PDF — malware analysis report

Static analysis result for SHA-256 802f4917e19e8a49…

MALICIOUS

PDF

89.4 KB Created: 2021-09-09 13:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd7115ee9ace203d06b4d96b3eaa18be SHA-1: 33e0094c659ef6c7178c4612c250abc923da71fb SHA-256: 802f4917e19e8a49baf6b2a6519a4d29ddd6ede4845ac45066a2c0d334eb2a33
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous external URIs and functions as a link farm, redirecting to various domains. The presence of external URIs and the link farm behavior strongly suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://inwebjor.ru/uplcv?utm_term=flux+weather+apk PDF link annotation
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/7757455089.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/70175419814.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16131079be5245---sisik.pdfIn PDF document text
    • http://iscelenie.info/files/file/belonoweremisugakuzopegun.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/wasaxo.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/felalisopib.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613794116011e.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/dufinerudotekufoteg.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/17656485144.pdfIn PDF document text
    • http://belovosushi.ru/files/87355469420.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/sivejunevaledigadadinelu.pdfIn PDF document text
    • http://halmar.info/userfiles/file/perirepazapimamizusoja.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/29810418983.pdfIn PDF document text
    • https://resicolor.com/upload/files/kovabanoxoxid.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/94662035310.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/losasogesonu.pdfIn PDF document text
    • http://surausa.com/uploads/files/rawuzojovujisobirad.pdfIn PDF document text
    • https://terrebleue.org/userfiles/file/15997245474.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/98774664441.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/buguratumo.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/vibiliz.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_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 19556 bytes
SHA-256: 5ad7a0ea330774c8bdfbfaed481c5276ccd142f095026aac52481ee0c96c68cc
font_01_sfnt_off0001295e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14175 10224 bytes
SHA-256: aba85f2514d9f77c9de864999b7b840b6dec4d95e13b4e5ed3aba8d0bf9f2d02

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