Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbe9a1dd46fe089…

MALICIOUS

PDF

78.5 KB Created: 2020-11-25 21:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b77d1f4b74f4681f7fa070a2f6b15e6a SHA-1: 6e1b858103f102ec755144966d63478b41b59077 SHA-256: 6dbe9a1dd46fe089dd17d4047366b708aef6b73f5bea758db1c93056325fcb5a
214 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 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 0.9998

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://cctraff.ru/123?utm_term=pure+green+coffee+bean+extract+800+mg+%25CE%25B5%25CE%25BB%25CE%25BB%25CE%25B1%25CE%25B4%25CE%25B1 In PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/8429915.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/xexumetofir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5fbbd367956c7.pdfIn PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/d9de4215a60.pdfIn PDF document text
    • https://satupagewamikim.weebly.com/uploads/1/3/4/5/134584558/tijaxikipuwewu.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/fb88ca66eb012c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5f8df8df5c054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_5fa98967c668e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_5fbd9fcb66b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5f91f5fb06e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5fabed9e078b8.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/b0c1d18b-402b-4f9d-9f21-bf5baad07fa9/zefuwexaxuraliwabet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbce5d77-75e2-4cf8-a4e5-f03f753f9286/karayip_korsanlar_mzikleri_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9763750f-a626-4eea-b5bf-fc56452185da/jotiwejivazomasujeroxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61235a15-cf10-4dd4-813d-b9e7f7281d84/moniz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 6104 bytes
SHA-256: e621569fc643dd355f01d0f241246a376831f3bc0aab33ad23e15843a4032104
font_01_sfnt_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 11080 bytes
SHA-256: 2d5f1ca05f453963df2a6c407f8cd6df5abfbd0ee52c33dbadf74ff06c967861
font_02_sfnt_off0001154d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154D 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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