Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dd5fbba14e579f…

MALICIOUS

PDF

91.6 KB Created: 2021-10-27 05:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1e0d56a582f03aeb3334c6b3605358eb SHA-1: db65deae570d4960c35d0ba6d0192ae573c2c6b5 SHA-256: 04dd5fbba14e579f2ebdab9638c3562f154734c9b12ff510e8c847cfa1b130e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to external PDF files, indicating a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests these links are used for malicious purposes, likely to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://moscowballet.ru/userfiles/file/47249380820.pdf In PDF document text
    • https://onutglen.com/caningest/images/file/99559830733.pdfIn PDF document text
    • http://mp-journal.com/media/file/62093034058.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/45093348758.pdfIn PDF document text
    • https://hyosung-gulf.com/uploads/file/26744104335.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/53057281603.pdfIn PDF document text
    • https://egca.fr/userfiles/file/48358078397.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/18396215264.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/wivefufexitez.pdfIn PDF document text
    • https://businesslife.com/content/file/52266458094.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9448579e8e0b42367e147d67c69e753d/volorimiluduzipopiji.pdfIn PDF document text
    • http://saint-party.com/media/file/48922341038.pdfIn PDF document text
    • https://latgamatniekilv.enterlivani.lv/files/file/1782350521.pdfIn PDF document text
    • https://apapunada.com/contents/files/26876903903.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/b824d43b405b2395d38fc2407a3e0981/66463805522.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210919_1BBC4356C46A4825.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/gekenodotid.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/41359613785.pdfIn PDF document text
    • https://betsin.org/userfiles/files/naxilisobunazukaj.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-4/20210904052730133297.pdfIn PDF document text
    • https://pokereshop.cz/data/file/91307767768.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/kuforenalada.pdfIn PDF document text
    • http://teplicky-fotograf.robert-zauer.cz/userfiles/file/7550575108.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/35949847650.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/tgwjJlsMqHc/uplcv?utm_term=advanced+comfort+technology+makes+waterbeds+forPDF 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_off0000fa46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 19144 bytes
SHA-256: 4df8a065c945dd3df57d286347d192dd445f855df984bd939fc8b9657dddf6ca
font_02_sfnt_off0001444d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444D 11312 bytes
SHA-256: abc49fd7f3c9406acb9b42a217e7b6b5b6bcb2d75ec5f86efd38d0dc9f444eda

Open this report in the interactive analyzer, or submit your own file for analysis.