Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e6467370d63b29…

MALICIOUS

PDF

70.1 KB Created: 2021-04-05 10:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8f50dba6a0e519cc48d80c9e5168c46d SHA-1: 262441bf22520f0b65614f513b117b89f1c18f64 SHA-256: d9e6467370d63b29c474b5ea5581f2027f417283c5562a613ee37802dd6d2450
136 Risk Score

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it's a phishing lure using an SEO redirector. The embedded URL, https://druttle.ru/strik?utm_term=york+furnace+serial+number+year, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest it's designed to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/strik?utm_term=york+furnace+serial+number+year PDF link annotation
    • https://cdn.sqhk.co/zodunoxurob/jajanao/business_plan_appendix.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/GiajcoM/zewek.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/geiemia/wifi_file_transfer_for_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenako/wgcien8/free_fire_funny_video_whatsapp_status.pdfIn PDF document text
    • https://cdn.sqhk.co/fufeboxeri/kWgdkhh/86701498461.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/yM587ii/turbo_200x_run_capacitor.pdfIn PDF document text
    • http://rolazipomi.22web.org/list_of_synonyms_and_antonyms_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/5GEQcGD/on_my_own_ross_lynch_piano_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/jThbUjg/wijodiwu.pdfIn PDF document text
    • http://jibinomazovujug.22web.org/marajazesikubipuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74309a5-ba0d-44e0-b110-d00eaf323428/55939184456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30516f99-0c1d-4b39-91cd-771677c21990/gupivevezugujaxomokifibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3502ca18-ba81-4850-ad3d-31bc00d06c6f/zatux.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/89688131765.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/47992732468.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/74616546591.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/dragon_quest_heroes_ii_guide.pdfIn PDF document text
    • http://beduxuluwuniva.rf.gd/water_pollution_information_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c2311d-6362-4482-b1aa-079343ac1bf0/how_to_buy_ship_insurance_star_citizen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bf075b-f293-404f-a113-948ac8dddc7a/the_essential_keto_cookbook_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/bosiwapibuberaxol.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_off0000d541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD541 5296 bytes
SHA-256: dc5904be1c5a4869f70a7ba48c268765bf9a34cb64d5b0d6a5d661e343db5a81
font_01_sfnt_off0000e738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 10544 bytes
SHA-256: 2c8ec949383dbe82c8754e886a61843277bdbf45f6572dfc2473506c9e5fcf1c