Malicious PDF — malware analysis report

Static analysis result for SHA-256 229ee98ee067e31d…

MALICIOUS

PDF

75.7 KB Created: 2021-09-07 08:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2c2c00fa93bfaaa84285aa59ddf641dc SHA-1: d57860c07ff14fb80e3208cdd3ab1dca8a573cbb SHA-256: 229ee98ee067e31db6fa69c505284ec924b93642616a48643e92430b0f7df35a
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. The embedded URLs suggest an attempt to redirect the user to external malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://driscollandgibson.com/images/edit_images/file/podarurowajodomed.pdf In PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/323a6abac6a126bf2e762e5d22ed4e08/81320103013.pdfIn PDF document text
    • https://isleo.com/i_photos/file/saxide.pdfIn PDF document text
    • http://art-ball.net/files/file/fogaz.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/99047990673.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/bularu.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/metuxoxa.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/8ff552101da830abf3a0b3e54420bfc0/66424164738.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/4c201b3f07a9232fd1384ef3c88beba5/jegenasuf.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac64c49bab8---tikomenokelobemazaxu.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/jikelowewimurivomazafusef.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/46311198516.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/31801879666.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/41a3829412c070cf72f3c06d15a41ccc/92460016440.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/49922407617.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/fazozapavuzotalibox.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2929a7c15---46214849348.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/65867032688.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/723164c18a7cc16b5c2eb305c7a22344/10166562655.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/3217242158.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/12280219322.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/10220846003.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/o0eob5sgng1j7ppbsfp248s9no/17320417486.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/69889295026.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c8e37237fede876b85f3c24e3e136ad7/dugiwesugasobosuzijekuz.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/893c66e6f64baabf5d4472a799b61905/68351549222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=docx+to+pdf+macroPDF 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_off0000c42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42B 17516 bytes
SHA-256: 0b48faf3a4b149d3646e8ad48909d513e7a9fb58b8807315126e713adc371653
font_01_sfnt_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CF 10340 bytes
SHA-256: 18555b5a49198a3ee7e179e14be546977c30e9a758dc2016712ab10ea4bea93b

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