Malicious PDF — malware analysis report

Static analysis result for SHA-256 899041af087c446c…

MALICIOUS

PDF

76.0 KB Created: 2021-03-07 01:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85d02e7aa9b1996c5cc38a56e36a2b6e SHA-1: 93e1d5ff2a78317e6841038cdd801e623a99c851 SHA-256: 899041af087c446c3fc3540da4a9c778f459ff0f84f5faf626564ae56d3459cc
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://lozipotod.ru/strik?utm_term=how+long+does+it+take+to+learn+self+hypnosis PDF link annotation
    • https://nefarixuk.weebly.com/uploads/1/3/1/4/131407944/lelefiviwadera-kaxovepanobo-faratopufu-vemegimedubi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_6002db4cd4d2e.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/punawenijopewusosu.pdfIn PDF document text
    • https://zipixaxunisegon.weebly.com/uploads/1/3/4/6/134625234/ca47f2e2d99e3fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ff6847568965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_603f3ff2a3ff9.pdfIn PDF document text
    • https://jodatonibidoxej.weebly.com/uploads/1/3/5/2/135297120/gixugipiguzu-turawesoxavove-ranozupiwekim.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/7095605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_5fd81b23081e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467032/normal_5fc6d47c4b7c4.pdfIn PDF document text
    • https://befojawukirafa.weebly.com/uploads/1/3/4/8/134855882/nirotetozaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_6039cdc33b67a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448731/normal_5fe4ac5ebbfb5.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/can_you_charge_a_chromebook_with_a_usb_cable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_6012384ba7b3b.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/zigubitegebikote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_600e8615efaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5ffbcb01dd670.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/luxizuxadimozuloxok.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/satom.pdfIn PDF document text
    • https://wofalexo.weebly.com/uploads/1/3/4/6/134697980/moximiwokomofov_sotososuweladul_watijakoze.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_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 5524 bytes
SHA-256: 9a4f683a265d2c74f5276cbbce9b6516c06b57b44719f804c12a3ab01766584b
font_01_sfnt_off0000ff21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF21 10680 bytes
SHA-256: 7f04e681f138c2edfaab9b8a22908e8642c724ddc8baae6001958fc87f4f017c

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