Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b84beef7abeeee6…

MALICIOUS

PDF

73.5 KB Created: 2020-12-30 00:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2623fbd1f8953d680290894c381b7462 SHA-1: bc697243f7958213eab21658414f03b3d968d92e SHA-256: 4b84beef7abeeee61d71a59209b6d45051ce27a6e314e32c371e8d6ef39f5e21
164 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 0.9996

Heuristics 6

  • 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.
  • 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://trafftec.ru/strik?utm_term=spongebob+game+frenzy+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f8a88e1cb623.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/RDQkfil/85086981052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5f9ef8e0a3bbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fa5603e99443.pdfIn PDF document text
    • https://bilemupu.weebly.com/uploads/1/3/4/6/134654663/792030.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/hcgfii4/lolaguvolaji.pdfIn PDF document text
    • https://cdn.sqhk.co/wunemuruk/njdCFP1/birthday_cake_decorations_for_mom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5fa886f4719b1.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/c9c43807-82b2-4f75-80b0-4a125171ae83/showbox_apk_2019_october.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C5 5732 bytes
SHA-256: 7c6b3a07cc6fc772decf56c671fa73a57a71d5dc67effb6d60ae2ccd9dae6227
font_01_sfnt_off0000ed58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED58 13088 bytes
SHA-256: 7a95dea9754f14fa2875d14dd97279eee850aceb977c709351d64f9fe547b2fa

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