Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbac2db1cc053738…

MALICIOUS

PDF

74.8 KB Created: 2021-03-22 01:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c1edb3cc230591515cfefc50936c69cf SHA-1: bc0c3b7795852838ae609fc1cb08dc7799c56f0a SHA-256: bbac2db1cc0537388947ccd000a19e4861195909f49f0930b2d94e5ea9a09048
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to a "Carer allowance application" and embeds a URL pointing to a suspicious domain. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://kuzutuzo.ru/award?keyword=carer+allowance+application+pdf PDF link annotation
    • http://medolufinumul.sportsontheweb.net/business_information_systems_tutorial.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/wejologeb.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/kulejomufiperixuv.pdfIn PDF document text
    • http://xasujaru.22web.org/wadizibakekirunigujo.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/why_is_the_gnostic_theology_rejected.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/luwuwu.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/711f0adf-e399-4d6c-96a4-be1b9d2e4621/prescription_safety_glasses_interchangeable_lenses.pdfIn PDF document text
    • http://gevivosesiz.epizy.com/melifazu.pdfIn PDF document text
    • http://golunelew.epizy.com/97530431766.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/family_portrait_drawing_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546c6e76-f832-4d43-9b64-c75626eb87a9/48620708986.pdfIn PDF document text
    • http://dewudirana.epizy.com/powevaboxemikosodabas.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/91068151436.pdfIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_77f4b661b3184d4a9deabae5030d685a.pdf?index=trueIn PDF document text
    • http://vetanafajodomek.epizy.com/change_outlook_password_on_android_8._0.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/zofemovoj.pdfIn PDF document text
    • http://merapenerabari.myartsonline.com/lg_mini_split_remote_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8fe035-50f1-474c-aff5-69cce4f9bf2d/wemajisasoxolewiwoboz.pdfIn PDF document text
    • https://7a69a04d-b0b3-478e-a927-895b34d3dd44.filesusr.com/ugd/159848_b68e132c093245e2b5a10c2be9694b71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a18784-341f-4696-999e-267812dfae7c/full_body_stretch_routine_before_lifting.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_3c79891fad5648bea61dacd93a865656.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9096436-0879-4d19-adad-59a6983b2282/jejafomiguxi.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_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 4968 bytes
SHA-256: 60fbb0fb55be377045793f8e0f07cb2408ea1ef7f536c7c44be20ad33235c6f5
font_01_sfnt_off0000f9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A3 10708 bytes
SHA-256: a05057c2e62be372c52ebd0a6cfea547c2f3875fbf64060ea23c884437667f0c

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