Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f14d193fb2da20…

MALICIOUS

PDF

65.4 KB Created: 2021-02-12 11:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8fd56c086b606e3e783542eae1812b1a SHA-1: 807ee7b3386ebd75a0eafde2eaecd651eb0523b2 SHA-256: 44f14d193fb2da203d6c7ea8b77ecfd958670f2c949f7190bc8c40b9e9be2cd9
204 Risk Score

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.
  • 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.
  • 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://jacksth.ru/wix?keyword=ppsspp+guide+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fe05a00b97ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408587/normal_5fc61d33a9112.pdfIn PDF document text
    • https://lugoponogib.weebly.com/uploads/1/3/4/4/134404253/juzuses.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/rowanaxupi_bubeda.pdfIn PDF document text
    • http://2022god.com/eagles_their_greatest_hits_lp3kr3u.pdfIn PDF document text
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/5704775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_601cf7144a6be.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/wanegesefunovapag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5fd18eb24643e.pdfIn PDF document text
    • https://potigaguw.weebly.com/uploads/1/3/0/9/130969810/e7884697e.pdfIn PDF document text
    • https://nadaroxiwe.weebly.com/uploads/1/3/4/6/134688146/9e638ebd7f3a1ff.pdfIn PDF document text
    • http://ropukejak.22web.org/tabojiluzasan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377909/normal_6008c00627cd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402032/normal_5ff0b4b1ba100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_600c603346ee7.pdfIn PDF document text
    • http://love-cosmetics.shop/lawug0zzsn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403129/normal_5fe5322ee00a8.pdfIn PDF document text
    • http://firstflirts.site/nujepukagezagazabevekoy2yn.pdfIn PDF document text
    • http://topmassage.net/629821852117ou3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC471 5064 bytes
SHA-256: 85645025f889127cd533b53256d7741c4adacf9e3c2e71ab33701467230d3308
font_01_sfnt_off0000d5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C2 10028 bytes
SHA-256: 9a2a39ad8d97d82f0b1371035f0d47ee6ac39174014c274d5751fd4951845e44