Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acd68efe6282485…

MALICIOUS

PDF

81.6 KB Created: 2021-09-06 21:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 80e70ce3fb8b97cbc8b3f316404f41f2 SHA-1: 6ce444877da4a034d1d43821243c5e7d78f05b40 SHA-256: 1acd68efe62824853376b3ad80fb5e185be46fca5109539bdf5d99e90e6adce1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9977

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://irlanc.ru/uplcv?utm_term=2017+chevy+impala+service+manual PDF link annotation
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078af06a56b6---22780390082.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16073d295b7c72---4958821920.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/012ff2bd0570b8c63bc63c021e8b91e4/26012080644.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/nutipijow.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/wavata.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/72841500544.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/19912183570.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/763f26e44163fae6f821bd9d46b561f8/detinedezarusu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160783c85442d7---97150672431.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/83535035065.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607889a4830f9---53916250162.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/61797581983.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a7e6b70c23a3ee48579640de3bb4ab21/50354605959.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161096c4499cf5---faxukevoritoxe.pdfIn PDF document text
    • http://bio86.fr/fichiers/dorosemafumav.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/67992804b5668c4115e91d6861b4f5d2/mowivijubo.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3e93df8ca---37421337533.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/8hfm1p4ffuel7vcj2rplp8dv9e/10359982920.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/1c3u5so5nk88n2srts9kdc44f0/mabijabarenulakuv.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/vibidipulidepe.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/rubozesoximoxut.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210628152815.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210814_4230B5FA115F3B7B.pdfIn 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://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_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 10948 bytes
SHA-256: 2fb94750721b654510827d5890f0234a8cba08a5c1804f24331fa336523e6800
font_01_sfnt_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 16936 bytes
SHA-256: c6873bfe1f807451f060447aa60b7a08c678e4f7f5862c258131c07e51e99288
font_02_sfnt_off000120f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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