Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b52774331e5644…

MALICIOUS

PDF

84.6 KB Created: 2021-10-06 00:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1838cb456956aad10a955562ad5e7f2e SHA-1: 32c98158fd8c914ac0642d73afc3266ab215049a SHA-256: 76b52774331e5644e7bd28b8869ae29768d299fdd06aadd45987497ab092ed4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, identifying it as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://catamma.ru/uplcv?utm_term=principles+and+power+of+vision+myles+munroe+free+pdf PDF link annotation
    • http://ewtch.com/upload/files/80710473059.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/17165efdf3d1d1eda1ee587a24b10773/kivilumowumalonaxefusi.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/79427593757.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/68596836644.pdfIn PDF document text
    • https://pecintajp.com/contents/files/7741393312.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/wivixovewonixakufa.pdfIn PDF document text
    • https://rovetco.com/userfiles/file/24889403417.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/24414708091.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/22423681574.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/62039428648.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/katererisaz.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/fepagafopedubenovoleb.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/rozaf.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/kepuxasoxo.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615cc0f0154a2---vafawovi.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuzawibubamabalotonidipal.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/dotakugedemekusu.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/sasejupetumukujigu.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/tupajamefavonezixatozuka.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/dudamotaxos.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/66925027794.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_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 11052 bytes
SHA-256: 4ab65066a5f97eca3138a1112607f520fe523af4a0838a1a737d85271f1847c7
font_01_sfnt_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 18944 bytes
SHA-256: 0465c9210f8be0834e54ae11f781c9cac224d42bddf24fc8aff34c6b498ed6ee
font_02_sfnt_off00012c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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