Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2db4d60f7c676cc…

MALICIOUS

PDF

78.1 KB Created: 2021-05-31 07:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1f028a24d18b886d5a18b31e6251b3bc SHA-1: 27c147db6bd49aa618129b56290f286cdf804ee8 SHA-256: d2db4d60f7c676cc797e0c188eefaea63268849d4d25e0f2801065e9e21f6bd8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL 'https://xajibur.ru/strik?utm_term=show+hidden+files+apps+android' further supports the lure of potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=show+hidden+files+apps+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422897/normal_5ff6952f56f57.pdfIn PDF document text
    • https://vinedenakebuz.weebly.com/uploads/1/3/6/0/136020142/9319475.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/fudumezasadoluwujobe.pdfIn PDF document text
    • https://zalorapowil.weebly.com/uploads/1/3/1/8/131871687/637f06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_6046aaf0f3ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_6025b47460133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470038/normal_6007ce814e7a9.pdfIn PDF document text
    • https://keroxazoxap.weebly.com/uploads/1/3/4/8/134884937/215c6b34d.pdfIn PDF document text
    • https://kopikemuv.weebly.com/uploads/1/3/0/7/130740389/8df663bd66ca030.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/4b19f63021ab42f.pdfIn PDF document text
    • https://podosutopo.weebly.com/uploads/1/3/4/5/134590637/2795803.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/ad900df6-110c-43a6-8adb-d605b78397d8/adobe_premiere_pro_cc_2017_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c8f6ee-e0d1-451c-8a49-76e38acbd13c/duberakojas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9081acab-2f35-4ee3-a3cf-1703bdba0978/79523256248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7278469-512d-4583-96ce-a6ed8c919988/cuenta_conmigo_pelicula_completa_en_espaol_latino_online_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc64a4a-704c-4067-92f1-da6d27a8647b/lowiwolezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf1acae-3685-4da9-97aa-d2ff0a04d8cc/93535914688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2d55e6-9e90-4e75-9afc-bf70e842f2e8/daropijise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a072ee7-9665-4659-a3f7-421adde8f4ae/bivogetavebutawaxevoj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34E 5324 bytes
SHA-256: fab831b1425e0974ab8b3193090d75ee949a55a17dca1bceccb4c0ccd1a3cb21
font_01_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 11228 bytes
SHA-256: 19a381037ade908c4e1e861d1e137bcb59f028b66e8fe98238c37f1b79cf82e9