Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3b03254d22eb09…

MALICIOUS

PDF

78.4 KB Created: 2021-04-20 04:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2593e44d58f86a3fa832e0e23ce9b457 SHA-1: 7a38cbc0a20997ee498ded1a12c564dbbef8c737 SHA-256: 7f3b03254d22eb09ff166b671b5ec02a857b1dc2f0feacd152fa97d4178d6444
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it is a phishing lure, specifically an image linking to an SEO redirector. The embedded URL 'https://leonvi.ru/strik?utm_term=do+i+need+a+filter+in+my+keurig' is the primary indicator of this malicious activity. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest a phishing attempt, likely delivered as a spearphishing attachment.

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://leonvi.ru/strik?utm_term=do+i+need+a+filter+in+my+keurig PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421623/normal_60102d7ae8e95.pdfIn PDF document text
    • http://fortuneo.biz/667076009220nahp.pdfIn PDF document text
    • http://habercigo.com/58732092161cr99m.pdfIn PDF document text
    • http://mx50off.info/1493647490lrz54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_5fdc6efca8462.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/icNggjb/android_studio_synchronize_project.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469841/normal_601727935fa87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387701/normal_5fcd5e609fc0a.pdfIn PDF document text
    • http://invitesistem.ru/developing_chinese_intermediate_speaking_course_answersnc7ac.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/chfjbgd/titan_quest_switch_update_2019.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/sobaketemu/wubude.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_eca6dff534e948f5b9824185065b9d46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/37706430791.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_dec0edeb87c0494589f4076632a64dfc.pdf?index=trueIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_5ba075f3389c47bcbec0853223cce74b.pdf?index=trueIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_84347f6d5ce641a2bfedfb9f1e64f2a7.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_b703409681dd4de0a3fd5605abedff60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poresi/apache_poi_excel_cell_date_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/ziwekoxugefeseteli.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/39959518905.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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 5212 bytes
SHA-256: 66d135849d757606fd1e539fb00738f6558d6698fe35581d0ed317135a577749
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 10680 bytes
SHA-256: 27e3a66e90ece46d7a1c0d9333077d0299908ccee2e21507bc57af248f4f1f3c

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