Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89eba0fd1730df4…

MALICIOUS

PDF

76.6 KB Created: 2021-09-17 00:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 44fa3ac374d0ef9369101fef697ef438 SHA-1: 2fecf7c16235c77b76adbc9ca54148e9acb8657a SHA-256: c89eba0fd1730df47b83e0612210a506d9ba818f9ce71f0b21bd1b3d19fde680
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://h-p-n.fr/catalogue_dynamique/file/desonupedinonumiregeriza.pdf In PDF document text
    • http://ana-jsc.com/upload/files/88042254579.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/12243262219.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/patikewemavuze.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/bojewapur.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/laxis.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/8466d5ef0661416da67157b3529a884d/vojokinimigubaka.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/gazaramidijulodiseriwem.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/lububejuzuw.pdfIn PDF document text
    • http://eko-uklid.com/files/file/mosuguv.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/gonuwuwu.pdfIn PDF document text
    • http://chamdure.com/DATA/files/lelerozitadunib.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/xobog.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/64298243085.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/9el15bbpb74n3p985h2kn3pk5v/juxipobare.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/41282270089.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/32786913119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=principles+of+comparative+politics+pdf+freePDF 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_off0000c55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55E 10848 bytes
SHA-256: 04986540d9e192ee28f76de69bc04fdd20f61a0cad007b3d431a48a71e0717b0
font_01_sfnt_off0000de69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 18272 bytes
SHA-256: 2657ca233564eb4f2e6c04ac283531c14cd99d2ae6f7b9449692e07bd6942003

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