Malicious PDF — malware analysis report

Static analysis result for SHA-256 e955e148c759b14c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 07:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 316247195b52acc2c04e1c762b257c33 SHA-1: 62d6412dca25f35bbeeab69db2083d40f5fdfc98 SHA-256: e955e148c759b14c55d25a9a94f841d25e731a1053b74d2108178c9323212616
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one identified as a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful sites. The presence of multiple unknown URLs further supports the conclusion that this PDF is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/db11962b10b1681cc74cbcd6b9e6eb58/fodaranura.pdf In PDF document text
    • http://amadpich.com/userfiles/file/lamebedezowa.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/wikasawugoviv.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/tebawo.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/44995752163.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/mozebimopumudusoz.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/91054500114.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/92546160935.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/75702950059.pdfIn PDF document text
    • http://nanopena.cz/upload/file/dokone.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/sodarete.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/godimufu.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/kulokuvuzisedip.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/gelol.pdfIn PDF document text
    • https://servicepapik.ro/files/volevelusiluz.pdfIn PDF document text
    • http://hydrem.ru/images/file/18885312357.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/sotimapomazutuzetibubo.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/71872018586.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tifevojuluruga.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/9cdfe37f2bbe4471d7c8f9d921a37b4a/genalivam.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/pebuxovilasizataxiluke.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631159521.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/12189645473.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=can+i+3+way+facetimePDF 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_off0000de4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4E 18972 bytes
SHA-256: 62ba5b4977db37e36232cd675118d68231d74a01d6f0496d3b9bb127c90413fc
font_01_sfnt_off00010fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA6 10468 bytes
SHA-256: 321e700dce36cadd7092536d2df1ea9837c62db63a655f16b21aa738112cf88e
font_02_sfnt_off00012788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12788 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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