Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5892d56a88ab67…

MALICIOUS

PDF

135.8 KB Created: 2021-07-24 07:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5a80df19f0bb5513ff37e352274abc61 SHA-1: c7fc2264c6e0dff03a790113df8fd79d51d20f3a SHA-256: ae5892d56a88ab67eeaeb99b20cb043727043ef0d2f774a9b5cc151cde484550
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple links on disposable or compromised hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607848371bbaf---83326667684.pdf In PDF document text
    • http://fitviewer.biz/files/file/54189342790.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/fumaxekaxosumerefo.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/vinoparipedugule.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/dnf94mkkm3tocadl421r939lon/62662622851.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e358034feef---muzetidefeke.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079ad0536452---wakefedonogowuzavavefad.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202105300048260561.pdfIn PDF document text
    • https://invest.pl/userfiles/file/75096919710.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/zipotezuvufijexiruzuji.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/fanavudaxepamezagepaxejam.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/d5a85bc21cb942399540acce93f6a968/ragir.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/58485780627.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089543750ff8---1818428966.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee4eb40ee7---lokubabep.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/68139198945.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5bc66bd989ecb2456e5fc3db7e3143c7/ratanazelamipada.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/vosew.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0a7ed854f---2477000270.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/jekomusimirarenedawunopix.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/10754214455.pdfIn PDF document text
    • https://www.carrentchiengmai.com/files/27583176486.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/12072943996.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/26422873508.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ayat+kursi+dan+terjemahan+pdfPDF 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_off0001a656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A656 21640 bytes
SHA-256: aa358f26aa81a61bcc7767950d9c79bc78be0f70f05fde0e445a485923d414a8
font_01_sfnt_off0001ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDAD 11012 bytes
SHA-256: fdce7a5c362651cb5e44e74025afd11634d2535af7674e4ffe2a613fdd08d939
font_02_sfnt_off0001f714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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