Malicious PDF — malware analysis report

Static analysis result for SHA-256 a697cb50e6eed886…

MALICIOUS

PDF

75.0 KB Created: 2021-03-27 20:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0f561679c60cd9fdbeb70fb9e42da4c0 SHA-1: 5bc2984eaaae08ea2191d93671cbf6b7da68f6f1 SHA-256: a697cb50e6eed886aeeee627a1faad53abfbba336f3172cc0287cdb9be9a6002
194 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 embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=learn+akan+language+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412403/normal_60192f769fac9.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/gWVlhhh/nutigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470678/normal_5fd93b1843576.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/aHhajhP/how_to_play_imposter_among_us_on_mac.pdfIn PDF document text
    • http://togimiguluvux.iblogger.org/76665632856.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/ahdGjjy/the_quest_keeper_apprentice.pdfIn PDF document text
    • https://cdn.sqhk.co/razanifuwuz/iiicHOC/bengali_mkv_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/hjDCRjc/tovubadetesexarofikad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5fff9cc4b599d.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/Qjb5gcR/ftdi_232_driver_linux.pdfIn PDF document text
    • http://mesotimavede.22web.org/application_octet_stream_chrome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_1823cbfdac4a4f1f9d6f6248aa21bfcf.pdf?index=trueIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_cc2140bea48443de89e1bc8559c42cc6.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_6308d00ed69b4a63bc523e7e6474df10.pdf?index=trueIn PDF document text
    • http://dopodisimedu.epizy.com/signs_and_symptoms_of_tb.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_0ab57209274c44608a743de8d92971d9.pdf?index=trueIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_10bf0f416dbb4864809e9c47189349b3.pdf?index=trueIn PDF document text
    • http://dapudur.epizy.com/42551366793.pdfIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_ab7d7aa19fe946b5b66a1c3a57cab6ad.pdf?index=trueIn 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_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 5036 bytes
SHA-256: 592e65c1e1ebc35b01751931583f413ab4d6969ece0bb7d26bfc57a3611a43ff
font_01_sfnt_off0000f7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 12100 bytes
SHA-256: 68642b8f0bf8c0a2c37ce692511576d97ca4b687dc0ded014dd9e878d8045833

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