Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd51216e84b92eba…

MALICIOUS

PDF

70.5 KB Created: 2021-03-15 12:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b89bc1f380d94513de501b5092cb3e97 SHA-1: 5b9ad299c33de988f283011280b42007015a05d1 SHA-256: bd51216e84b92eba822b73fdb7c43541d59a55d4e465ffdddf20fc0133c7cb61
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous external links to other PDF documents, likely to facilitate phishing or malware distribution. The presence of a 'download' button lure further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://maypoin.ru/wix?keyword=greek+mythology+edith+hamilton+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/wobimore/h7XMsgd/history_of_thanksgiving_full_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_60119b2b56542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450730/normal_5fe8b96a8bed9.pdfIn PDF document text
    • http://maykistore.ru/steve_jobs_quotes_images_downloada5d0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443329/normal_6041f469a05bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_5fd895af692b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447649/normal_603706bf11374.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/jjaJQjh/audio_songs_com_free.pdfIn PDF document text
    • http://tuimag.ru/gutakuzibisidatomef3wk7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413228/normal_5ff9e71604d87.pdfIn PDF document text
    • https://cdn.sqhk.co/bujugasefoli/OOhbZjb/epic_seven_tier_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_602af32122e3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_7503be6a70d646ed93e770eff672ecd7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf8ef7a-b560-41ec-83ed-cbab7ac24b2c/jakurizamalujipijavuti.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_a2229ecfe72a4a4583dd622b3be4f00d.pdf?index=trueIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_cb3da0bad1d842dead1c8e6cffb29681.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b28d72-d1e1-4b46-bb46-c79c6fba6556/verizon_-_ellipsis_jetpack_4g_lte_prepaid_mobile_hotspot_plans.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_off0000d638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 5568 bytes
SHA-256: 11d7894f283b3a8ab25d908957d0eacb6f11cc4acdc4893aa4ec0beefbd55de2
font_01_sfnt_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 10468 bytes
SHA-256: 49b110ca8c4b9d552a84841d481f25a78e32b6ad67cb8a2d9b5f369825b401c9

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