Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccc53bb66ab04c0…

MALICIOUS

PDF

61.3 KB Created: 2020-12-24 03:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bcc8d8836c28310942c0d0a773ebad62 SHA-1: 52a2ea065786873125aa9bf6eb1e7c4b577c0f31 SHA-256: 3ccc53bb66ab04c015471c84dcddaa7eb785ba7e36d618ddefc7f30db4928759
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a 'funnel-shaped cloud answer' which aligns with the malicious URL's query parameter. The presence of numerous external PDF links suggests a link farm used to distribute malicious content or improve SEO for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=a+funnel-+shaped+cloud+answers.+com In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fdc036d64077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5fc2f484df104.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/Ejccjg2/dipopewoxipeximifino.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5fde4a680d9a5.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fd60df3cdbf2.pdfIn PDF document text
    • https://xolitosoxi.weebly.com/uploads/1/3/4/5/134583661/gipaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f8d9c860117d.pdfIn PDF document text
    • https://cdn.sqhk.co/momajuxu/tggha4U/kuginef.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/zizene/bikha_angni_gaow_song.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/baturugivajekelidokino.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/aaina_movie_part_1.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_off0000b0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B2 5540 bytes
SHA-256: 9b4f21c7a70b498091b5e4ee9e785bac2f247f34cc585fa1015d37aaac4f6e5c
font_01_sfnt_off0000c37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37F 10916 bytes
SHA-256: a4c6c4ab628dd939f015ef72920375f4276690dc25a5f72704bdcc31871fb28c

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