Malicious PDF — malware analysis report

Static analysis result for SHA-256 075483f2d1c8f308…

MALICIOUS

PDF

85.5 KB Created: 2021-09-12 11:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d8a886bd998c60ce38c2b7a5c6f90cf1 SHA-1: 73a856493fe367d50f1f2e930ef1cb831812a8e2 SHA-256: 075483f2d1c8f308fbc8777b4ac29b912d8e71530a8834af9f9790f9c5c36717
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, suggesting an attempt to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and the high number of external links indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://bbmeti.it/userfiles/files/fapewaze.pdf In PDF document text
    • http://timnhanhonline.com/upload/files/3605751837.pdfIn PDF document text
    • http://alkanboya.com/files/file///26180571676.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/43527558995.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/17741012795.pdfIn PDF document text
    • https://onecre.com/images/content/files/pakimur.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/zoxiloxepiwoso.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/sizitasusurazedumak.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/zutegofulejen.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/denaromofakixis.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/26172409149.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/pibewuloru.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/10347493118.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/wosuferodur.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/vigovewafuwojuboturalazi.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/kaxajoj.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/tujudonokosozeru.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/rumojiwuparokojewiwuf.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/39478617521.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/46921781336.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/10305039574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+organize+my+apps+on+androidPDF link annotation
    • 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_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 17180 bytes
SHA-256: f4275e8e4e065f207d2a7c0380c35645e60d519e09c877241e3ea11ee66f5d33
font_01_sfnt_off00011730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 10940 bytes
SHA-256: b0f0947e57b58be5a7f1098f86931e7fface47aca11111a13e72d8dabc07bce6

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