Malicious PDF — malware analysis report

Static analysis result for SHA-256 29aedf1213d0d058…

MALICIOUS

PDF

91.3 KB Created: 2021-06-10 20:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0e08b8da3b210a6318d322226c283616 SHA-1: b5b7789aa967519f33e5d542013c2db6bac1b7dd SHA-256: 29aedf1213d0d05811cd99eb78232f9dd0fffc8e0a4e02a8eff5fb4acfb3c4ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious domains like allytemp.ru. The document body contains garbled text, suggesting it's not intended for direct user reading but rather to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://allytemp.ru/uplcv?utm_term=basic+discord+rules PDF link annotation
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/1bd630e6ef259f9ad7ccd24e4e94ae78/63133907297.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/51fbf4900b55a68d896064b30cf5acd8/xagawoxobelibit.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/c3b928590fcf3fdcd08f04780e1661fd/64373537378.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/lazafilaxobawomina.pdfIn PDF document text
    • https://marosme.ro/hirek/file/mekelejoxelafe.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5c42af3b8---kanukaganarujusiwuluxibo.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ffe92d37da2946e1b6356c0ca26db416/buvebipunotavi.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a123f02ac69---36987469159.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a791a7d83e3---28591189608.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094497f734ad---zedoxinegobabiwerexokodo.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/menimokidonefepulalir.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075c8becb2b0---13566089814.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780e6f37136---gizagakujufokewazuxaj.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073e2651da0f---tewux.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/10365782096.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0os7cm4tjch9oeeh2o374q3tl3/2024495104.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071226d1e10d---jufes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12907 4984 bytes
SHA-256: f61570e206ba3b0d35331adbb3b510362b951ed63d6799a38ff4da18c74d7a89
font_01_sfnt_off00013a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A02 11480 bytes
SHA-256: 7358efa9452b6a98cde3e8cbdf689e287890722630a84d3afb750f82cd543cae