Malicious PDF — malware analysis report

Static analysis result for SHA-256 1344b529ae145e38…

MALICIOUS

PDF

82.3 KB Created: 2021-09-20 08:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 62260886bdf188d77c846e1d32cc542c SHA-1: e74bffc90fe56ed3c93020bd9b22181d9ba5aef4 SHA-256: 1344b529ae145e38bb32cdea88b79fb99054ad5f79169d86987d0b751226d0cc
146 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. It contains multiple embedded URIs, including one pointing to a raw IP address, suggesting it's part of a link farm or phishing campaign. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://behagi.eus/files/galeria/files/48460149747.pdf In PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/93f47e1bc5f0bc9f75d98c2f1fbb2b6a/91180642775.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/12398842686.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/gobaponubur.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/46060292220.pdfIn PDF document text
    • https://oferta.lt/i/File/navuwolozorelerufozogap.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/kavorojofalivavij.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/63200960989.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/foxeduwamez.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/bemokarutajukeris.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/63214487369.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/bosetoruvozipivumu.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/pumipogesudopalakaxuguvif.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/24827039382.pdfIn PDF document text
    • https://kalimati.in/userfiles/file/84094137628.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141aa25a12ab---niforaxumuvusinilu.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/64330621291.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161344093d595c---49442169532.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lolaxekufimalizola.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161428edd4ff9a---rekamewebanibujutavigi.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=inshot+pro+apk+digitbinPDF 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_off0000de35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE35 10676 bytes
SHA-256: e94bbac543140f60a1036d7f66c3934cb7946a3dd2590b780820e05f20bc70a2
font_01_sfnt_off0000f61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61F 17588 bytes
SHA-256: 1d160f605cddb2c0d011b256cc199df7d97c3d32e536c4ed8fe53403301ae20c
font_02_sfnt_off000123ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1