Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcc4f1a98c663bc…

MALICIOUS

PDF

182.9 KB Created: 2021-05-25 00:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bd02c30f057d89a7e6d9dcf339d09c67 SHA-1: 3b985cc4b79d82b8b2557e31a0eb557139a3e249 SHA-256: 8fcc4f1a98c663bc72ad70b98fd3d68ac458a16579e3ba775aac87a4b99a0ed2
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=communicate+15th+edition+pdf In 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/c133634b-87f7-4425-a420-88eb469f7ae8/corporate_social_responsibility_examples_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/vasefaxes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c66bd287-c318-4f57-9ad2-316cd60a78de/matlab_an_introduction_with_applications_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/49224365387.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/jitadituse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb55e490-3db3-4936-bf69-5052246fa2c9/povojigaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/3802296402.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/lezegagedelizajitisepuxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e536c6-3422-4c27-9dd9-62b4a7065427/14183272142.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/bhojpuri_movie_gana_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/northern_tasmanian_television_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e855cc1-1bb5-41d4-a9fe-40cac4adea8b/diablo_2_v1.14d.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/libozenefilemox.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/zuvezuvem.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/datowagajifiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4dc17a5-98ee-4605-bfe8-91d304a81469/yamaha_rx-v473_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f16e885-c85f-4ea9-8c96-5644294175ff/staples_canada_shredder_bags.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/pedomuxiziseboluvo.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/why_do_websites_not_recognize_my_computer.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_off000290ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x290EA 5172 bytes
SHA-256: 533d3b9f5179c894b66631696dbd5b397d3bd4d87ce965fcbdf6a8af679e6c90
font_01_sfnt_off0002a267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A267 13776 bytes
SHA-256: aae035419f89364e819653b42c679724551cada54300438dea67a5f1b9a7071a

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