Malicious PDF — malware analysis report

Static analysis result for SHA-256 4509f532a0001b93…

MALICIOUS

PDF

69.8 KB Created: 2020-11-25 04:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8ebfdb4f4ae9309b5705028fcfa3f1ef SHA-1: da3fdcc5a7008fbb89c322cadaaf5119d85a2b38 SHA-256: 4509f532a0001b9342708790161232cd33c2f4909315c2fef3d430b8c1f15278
164 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. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/strik?utm_term=thought+provokers+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f90fe18cfecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f8cbe258b72c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5f8edc2737152.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/37f000bb989e37.pdfIn PDF document text
    • https://takaranedo.weebly.com/uploads/1/3/4/0/134017801/9906934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5f952a43955f3.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/2739071.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/rozime.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/anime_movies_free_english_dub.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/milady_s_cosmetology_book_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e730fe-19d1-42fc-b96f-23caa44589f1/zejixapibozalobugena.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/australian_super_account_based_pension_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/fce_cambridge_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/sasowixapuxojugaper.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/24734377742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da06216f-7b73-439d-b051-01ee1c629a59/gun_raffles_texas.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 5212 bytes
SHA-256: 3d6e4ef9b05dca8953f3f23a810b4864990432c35370a444538f305ab4b6e84d
font_01_sfnt_off0000e4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F8 11108 bytes
SHA-256: 2497e62be45eac423b1b94ccb65fb1802838a2d739cc2c365b23e3199d110395

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