Malicious PDF — malware analysis report

Static analysis result for SHA-256 748a5ab8e541c929…

MALICIOUS

PDF

72.6 KB Created: 2021-02-08 03:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7044b87d355213360e9538504ac39fc2 SHA-1: 30c7536c5fc8d19e2fc31e4d2025042437628284 SHA-256: 748a5ab8e541c929472c5d1a0c64f647b0e7c9fa665e1f0f5497dddb2137a86a
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, with one pointing to 'https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/wakolosubake-labutaletozuka.pdf'. The primary external URI found is 'https://baarspo.ru/wb?keyword=acadsoc%20training%20kit%20answer%20key', suggesting a lure related to training materials. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9625

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://baarspo.ru/wb?keyword=acadsoc%20training%20kit%20answer%20key PDF link annotation
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/wakolosubake-labutaletozuka.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/b11b8d.pdfIn PDF document text
    • http://gogotmif.space/wikipedia_donation_legitz0k3g.pdfIn PDF document text
    • http://dsv-trening.ru/zewolojinanubonezudinf0si5.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/biselumumuwetik.pdfIn PDF document text
    • http://talkme-news.info/anatomia_de_los_animales_domesticos6eusa.pdfIn PDF document text
    • https://jonewaxuge.weebly.com/uploads/1/3/5/3/135319919/pokadarovusuj.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/denowupori.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/vegoxupezoz.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/2270670.pdfIn PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/b70ff413af40f0.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/belapawerezuju/baasha_tamil_movie_hd_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/faleki.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/autodesk_eagle_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/gupagibuwoleb.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/kisaxazuvida.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/legiwinozovobamodizogixi.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/firefox_quantum_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/japanese_mahjong_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/free_thank_you_template_for_powerpoint_presentation.pdfIn 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_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 5320 bytes
SHA-256: 544b2d736e7ca5db44fbbca48e2b406bfabe6399755d234d3e117a425a6d2435
font_01_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 3196 bytes
SHA-256: d4249be99e1f4f46638560f9931f0a23f42959a1bf36f0e51294a1c624c90433

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