Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fe304bcc2d069a…

MALICIOUS

PDF

74.3 KB Created: 2021-05-06 19:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 14a337971f0a2315ae6770b4d2e790b0 SHA-1: 5bf73ab312a70f30222a5fe16ae338d0b33de16e SHA-256: 40fe304bcc2d069aa0b7c5177850958066fc897b62f3fd74b83bbc42af84a5bc
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=the+hobbit+movie+download+in+tamil+dubbed+hd PDF link annotation
    • http://stroiline74.ru/what_vegetables_to_eat_on_atkins_diet878ug.pdfIn PDF document text
    • http://itanah.space/48182523323s8yah.pdfIn PDF document text
    • http://copyrightproblem.com/gidefopakijolafn105n.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/kizawowepozesilivi.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/john_deere_750_tractor_front_weights.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/urdu_books_free_download_blogspot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_601261d98431a.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/dafavavabejegejol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489586/normal_60674aae2e374.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/73999937529.pdfIn PDF document text
    • http://salea.site/amar_chitra_katha_ultimate_collection_free_downloadqmxk5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ropupifalapoges.atwebpages.com/wopemim.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_d09c8b8a40f3410cad5265d95a27ddfc.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_f44e28654cb24c1e8618c8f363b28d34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d559f66-ee76-446f-a87d-7c9df85a4f20/new_dance_group_2019_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/871b4d38-6e14-4801-aee0-b9823677cd11/how_to_prepare_for_a_house_inspection.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D9 5032 bytes
SHA-256: 5c69fb79b2c6a2c16a2cccc756aaa531d547e589100c6e78af1758b8f5705343
font_01_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 10908 bytes
SHA-256: abe9599c061716ad6c6c2ce0e338b37185aa6a84c283eb8bdc4ecca3d7bb8952

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