Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a6653a00f47a4e…

MALICIOUS

PDF

71.1 KB Created: 2021-09-07 14:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d39188f732c24d524e283b12d522ecd5 SHA-1: 8a3f568e64da6c8af8888815adc88bcda7a44a0d SHA-256: d0a6653a00f47a4e94631277304522fdfae6fd2a5902b33a17b3adf51d9091ec
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to download further malware or engage in fraudulent activities. The presence of multiple links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://people11people.gr/uploads/File/gevufam.pdf In PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/e78e6412765e2256febd1dca63c8fb2b/mobiranafuwolaneneronok.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/20be2f5619c669968e91e10b1fe412e5/12976361773.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/davenup.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a8dc3d71d---lojawigitezus.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210814031331.pdfIn PDF document text
    • http://zae.me/datafiles/file/34076966302.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/67648067098.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/66717598305.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/63065876349.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/0d0b2455e790844b4993b76d0553af52/74261402513.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/9988odvac6llib6ir9ad8hoqs4/sululelakijamadi.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/benekozabuvewavana.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/bat18vcvcvlhmedpmumtql8st3/68637300936.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021061301173870554.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/256b7357ebcfa4e2b3f70d4de7e1a85e/koluxodefojudoso.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/misuba.pdfIn PDF document text
    • https://x-software.cz/data/file/bawemefajedojuja.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fdcb73e55---56700863036.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210706_081645.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/87de333c3b634ffd2d72bcfba39d5fec/88478739159.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/gexenozadabajijexezezo.pdfIn PDF document text
    • https://mashura.co/userfiles/files/mabowig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=adding+fractions+worksheets+ks3PDF 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_off0000b60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60A 15304 bytes
SHA-256: ffad1bd0d4d794cfe14330b331170c263021446ff3538822d674cd07a49c7b76
font_01_sfnt_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 11040 bytes
SHA-256: 800e3eb08222a8dd95c5c756028688c4cc6887c501985a4925527ce01c3e5914
font_02_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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