Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d3388ef938161c…

MALICIOUS

PDF

85.1 KB Created: 2021-07-18 17:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7ba7a5eece948fa51a8b4186f14c2e5a SHA-1: 467f28f0be8ab267c67a67a1f751085a3b46e487 SHA-256: 06d3388ef938161c5e612dd8e5c134f7b385700e72eeee25a9a112daed138062
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 trojan threat. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of numerous links on potentially disposable hosting suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://kompletucetnictvi.cz/files/file/xibeduwemafexokom.pdf In PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766dffdf38c---wasokunifuxopovuba.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/0c3118a1c34bd2c5e617acf81bb66947/mobijupomanebatuweruditos.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/biwobulez.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/84527664927.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429145124101.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/9123dbdbb37447c964f4bd77840bf6b3/nidadowe.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2fb3e7a3---xuzibefujelegobiruveg.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/kakivetexi.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/as3m711me7i0fkug6dlct3dn07/25525475067.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/19046135005.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609a54aa50573---91328105395.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/jawurukazunidoz1621939992.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4eb7f441---wosixudirelotu.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895c7d45b01---gowugedewamoxepisiropatat.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/158c5bi8ia53jdu0bvitfh81t6/bulosujez.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/919491431e7416d363254d3c5624f41d/topimuzagifetotarofukar.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/nafifobudogiremulixupil.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12ff972a67---rovibixodokiwo.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-2/20210502184649289119.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/pabuwew.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/59878552030.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=list+of+subordinating+conjunctions+and+their+functionsPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 16560 bytes
SHA-256: 0b66f85b6c19763b3c6e79e90aa60b461057ba6465ef9fa5d0c4d61b6b94fa4a
font_02_sfnt_off00012b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B94 11036 bytes
SHA-256: 1f7482c3531ed5d55a6cb43bff3d362ad15dd4c6b1864e2466e0dd950b163306

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