Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb830e25d7184180…

MALICIOUS

PDF

76.6 KB Created: 2021-01-05 20:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 30098a418599d1f630e8d0d41b4967dd SHA-1: 0225581bd610bca71aa859128d7d4f535b887a69 SHA-256: fb830e25d71841808ae4d9d0e716c07be2da14314cdc17a9a0b443bfdc291ed3
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external websites, many of which appear to be part of a link farm designed to distribute malicious content. The primary link, 'https://traffmen.ru/aws?utm_term=child+support+income+reporting', is identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://traffmen.ru/aws?utm_term=child+support+income+reporting In PDF document text
    • https://cdn.sqhk.co/sesijisova/haieieX/45280909700.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/9958906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_5f9f1f851ad1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_5fba6bfa7338f.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/jhe32hi/download_apk_3d_skin_editor_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/hiIuidK/lererer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fd6198c405c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5fea0314987a6.pdfIn PDF document text
    • https://folesatabija.weebly.com/uploads/1/3/4/4/134441350/6999098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5feebb973baec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424341/normal_5ff4834dbe16a.pdfIn PDF document text
    • https://vilewufatavak.weebly.com/uploads/1/3/4/5/134585542/624fa6f474f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f870045a4abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459936/normal_5fb017a7141a4.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/e6ghfP8/nazetevugepetab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 5184 bytes
SHA-256: 1b4ee6f6194f1580d2e7888d1493df3f4fedd1cf910fad348e566ac19ace8687
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 10648 bytes
SHA-256: c320efb316b59bbc8953302c3c4ff74a7e343776515d3aeadd58aabd1ac6bd23
font_02_sfnt_off0001178d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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