Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc9d2dfce387e68…

MALICIOUS

PDF

140.5 KB Created: 2021-07-15 13:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a9c5b422d37506bcf75c678f02a4c46 SHA-1: a6926872e2dc160fddf59a0bf1859bc61b81b6bb SHA-256: ccc9d2dfce387e68259173e8dd9624ff8a68e45a079814f9fc1ca33b4929dad6
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms hosted on compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://huntic.ru/uplcv?utm_term=play+with+pubg
    • http://insidethedigitaltrend.biz/userfiles/file/lizim.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbd0db9543---53443442877.pdf
    • https://angkortaxiservice.com/userfiles/file/33628484018.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/62bcefb187d94e66d63912aac0e91f85/vaxuxovemadirojo.pdf
    • http://www.chatanakonci.cz/userfiles/file/gonefuxew.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8fd545809---mofumava.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6cede9f3f---20951447010.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb9043dbe6f---21134372000.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070fba84e860---40491324929.pdf
    • http://c-amc.com/upload/files/10618850676.pdf
    • https://bjsteelvietnam.com/upload/fck/file/rugofegunivokovejokewow.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160980f9837821---sobigunaranenisubu.pdf
    • http://beastyenergy.com/userfiles/file/lezes.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f221dab803---3682709.pdf
    • http://syuncyoku.jp/upload/file/pozuwurajipiwobezitab.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160dcab7b6eaac---megebadele.pdf
    • http://bachova-terapia.sk/images/file/xakezafelunojabofutemosu.pdf
    • http://aliceinformaticasrl.com/user/pages/zafagiwewufezavonuju.pdf
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/bajulexokasevaxipev.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f062b9da52---85298605875.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccbc3e4609---mibabidukisuveris.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df12430cebe---pesejife.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/76c3388f66ad30cfcc8a8583e57053bf/luferodajuxobagos.pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/93179c9e7fc6e9b0bc0ce8cc71077b95/75009575394.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c660.bin
2a8425f6f9d7497e10a20a1396f65c750bfc8343c82d79ceb2477424caa3dcfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C660 17872 bytes
font_01_sfnt_off0001f541.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F541 16792 bytes
font_02_sfnt_off00020d58.bin
4ef90112f5cc6da0d7c32c4536c6758d203184be055345912808652fa4efdaeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x20D58 10348 bytes