Malicious PDF — malware analysis report

Static analysis result for SHA-256 e711a0171f54621c…

MALICIOUS

PDF

79.7 KB Created: 2021-09-09 02:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: adeeab645f9f92abbd9c1d29a0de6572 SHA-1: a840958b6abb1784107868824626b4fc3ed14811 SHA-256: e711a0171f54621c57449c84ba262b6a78188d46b5a161904948bd1c76288f08
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://kmkmekanik.com/upload/ckfinder/files/filog.pdf In PDF document text
    • https://ibextrail.com/editor-images/wuwetogojusurub.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/dojupoworugigojup.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/mukax.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/zemulate.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/2230170456.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/79424753649.pdfIn PDF document text
    • https://manhremhoangvan.com/wp-content/uploads/files/bujekapujiw.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/23792803166.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/67171819630.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/87656727097.pdfIn PDF document text
    • https://ysh.my/userfiles/file/92913160507.pdfIn PDF document text
    • http://iltorg.ru/upload/file/55470545891.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/473929301.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/74430845893.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/74629362852.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/71035226278.pdfIn PDF document text
    • http://armanetti.com/images/84318263555.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/85456734183.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/35173999129.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/mozibamemanusuxifimip.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/71430245389.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/wovojikule.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/tetexogunazofafojej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+check+temperature+in+android+phonePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 16596 bytes
SHA-256: 2b0de3ac4fc003e12e7a6f1d930033e7c4b6abb8ba22b92ee6d9cc2b719ab9b6
font_02_sfnt_off00011854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11854 10836 bytes
SHA-256: 5876effefa7a8da7b6547ada2f633722a8748429e45edac58e338ec5dcad320f

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