Malicious PDF — malware analysis report

Static analysis result for SHA-256 029dfbb42ec3d41d…

MALICIOUS

PDF

123.5 KB Created: 2021-06-29 00:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 41a9f262f5fbe3db00a8b67d304849d8 SHA-1: 6b944fde4cc3eb843bfb512e5bf58fca24e35ed5 SHA-256: 029dfbb42ec3d41d40cb8581902dd7c014fd6bef0edcd4db4f1611156deb5376
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious destinations. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0375e925---88576315657.pdf In PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/uiun6hhsub8r15thnuqq7aqeg7/85962938509.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160731995c3d1e---liputovutewopew.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/tovezum.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/06f682d90ec62645c5e064db92d7e199/demojifuvowotaxopuzavejeb.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/zekenejisenamasu.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1623694299.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8mu6fm9tgtrfl0km5opbk95j53/nelitafilelo.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070ddccb327c---jefegoxamugik.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/3c5ore3p2cjsbfdu4rllifct75/75481590969.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/favapoboxoni.pdfIn PDF document text
    • http://c-amc.com/upload/files/66243871390.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606c992b48374---nitov.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c51567f29bb2afb3a26010bbbfadcef8/72648774742.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ea7ccaaf3---14770718867.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ba217ce19b1---53342351698.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab14092b2a3---vonugesadidasejige.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc81c2cfbd---62797803169.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/4ff4bc273540ec04ceb33975b9e8032f/43355994897.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/rlpgiqkodsrma19j2avv0lvvm3/24093322267.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/1qajr1nct0pmbfoscndouei3qf/nufaxazewukofibub.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/26e605a7b6b2e431c59c4e1e1c6bf66c/25023464644.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/nibop.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/14605309766.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/18712130338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=star+wars+knights+of+the+old+republic+ii+the+sith+lords+modsPDF 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_off00017f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001972d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1972D 11560 bytes
SHA-256: 1c14a496c7bf3ba57c5baad72ebee8c4540116f8cfbc2368df6de3d2a07df33f
font_02_sfnt_off0001b1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1FA 17592 bytes
SHA-256: 8bf0f7e548366d0c0401971da855fa8c35858457ab9fe04ab9a2b428c25c4d7a