Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f2024f6765898c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 23:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7374ec7db174ed442005bd7809b22b18 SHA-1: e5ab59789b918e6946181732d836892260bc520d SHA-256: c8f2024f6765898c79e0d828471c236179ac9b4516cc000013863c3be7efdbb2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, many pointing to potentially disposable domains, suggests this PDF is designed to redirect users to malicious sites or host phishing content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/2qfd42ohenlqu4l6ka8onha1fl/93202791376.pdf In PDF document text
    • https://vresponse.net/userfiles/file/vebowutozo.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/boluwexixikuwekikuni.pdfIn PDF document text
    • http://unseretochter.com/images/file/zobalevovuzepuwopegufa.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/14106796232.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/metogotaxafojenenazi.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/36896803165.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/14694439166130c4801e66f.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/7275112266.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/71763921176.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/tulumujizamumoja.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/pomakewuje.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/niwunil.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/raxaletufakudamekurefen.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/64133568270.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/xutobisuzukunuvi.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/ripupixadasamiw.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/mevipimomodi.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/sosezoroxemox.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/30248308049.pdfIn PDF document text
    • https://villadelauca.com/userfiles/file/53322989144.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/sotilepiduwoxosubot.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/70868232995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=star+sports+1+mod+apkPDF 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_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 10396 bytes
SHA-256: 53dc9c9d1a06abba0f7bf99fece4fd1330b534da476f892af2dde1a9810a4ace
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10895 18484 bytes
SHA-256: 874c75f6da26bbc1772ed1719ead54136e45e8da54a44298126272b4ecfc7d9d

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