Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d09d23606827f8c…

MALICIOUS

PDF

92.2 KB Created: 2021-06-24 20:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 59dafc82cd02b42a18cabb1a48ac7e39 SHA-1: 1cc7657ea90bc5ec03e0568fbe8bf91eb3284c15 SHA-256: 2d09d23606827f8c80d6b5550d6f71f8cb5ed80e31d68a16c96c1b6332cfde8f
156 Risk Score

Malware Insights

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

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://chcial.ru/uplcv?utm_term=tamil+nadu+old+12th+books+download PDF link annotation
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16095d658ccf5b---sexumizawuvivanigo.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606f6b180419f---waxuferuma.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/rezomekizufozokopabi.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/86022292037.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c688c36c60---86853090264.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a64d49c8368---pizasupotoxumojirupej.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/53634379100.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ffddbc0d4---maganurugamagezaxisava.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/d39535224983bae91bf3dbcba37d0f5c/jumowasedanetuk.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ae833373---37575294477.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/bubowuzuxebogokada.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/99346908352.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826b7aeecfa---9209493651.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/83394609678.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/5d105565e3cbea08030a56576fce7518/69920190494.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d293f2be3b0---tizedisotomekelewuv.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbfd38f974---89826850867.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/navebogevegudarufagalenel.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f04e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF04E 17668 bytes
SHA-256: 8db39ab1eaafe4afacae669d44488f14b7a20a3f0b1fa4fcb7d91db94fa4e5cb
font_00_sfnt_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 5396 bytes
SHA-256: 670cd8ad04187d47c2477af23d47f660506552a24544c9788b8dc7769bbc9cfa
font_02_sfnt_off0001179a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 11124 bytes
SHA-256: d97de763155e23c104a6692b51d3ebedd48fce8358436c269029a93bce0b0e2b
font_03_sfnt_off00013db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB8 11324 bytes
SHA-256: 3d25865bd5858957d3e90558dba9eab9915f02268bc4f72da5b7b07df9abdd27

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