Malicious PDF — malware analysis report

Static analysis result for SHA-256 276af63a114f148f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-03 23:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9af0c21d8810ecbc760d9981e4ed6d5c SHA-1: a29ac9d6292a4dcb35d2b93464e011abaeb298be SHA-256: 276af63a114f148f7be6767dd70d247f548d0989bfa8a126921ebf43774aa544
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL `https://pelibifir.ru/123?utm_term=beats+by+dre+commercial` suggests a phishing attempt disguised as a commercial advertisement. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=beats+by+dre+commercial PDF link annotation
    • https://cdn.sqhk.co/vakenuda/iyPjcVZ/jexapam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_600471572dac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_6025f3420f4b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_6024f3536bea7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495034/normal_5fc9d50157df4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375885/normal_5fcc6361ea9f9.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/10786172844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366359/normal_5fc8124db12c3.pdfIn PDF document text
    • http://juxefagag.22web.org/nuevo_uniforme_pureza_de_maria_bilbao.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fe740e1cca30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460449/normal_5fcc7dbc7ab93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_602ebeeb0c9e4.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/63590368685.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/how_to_calibrate_iproven_thermometer.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/ssr_125_exhaust.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419851/normal_5fc7f3266be45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_6006aff1236f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_600189f90f935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widepidaba.atwebpages.com/26252929055.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_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 5376 bytes
SHA-256: 58e91d682fd107fde4b5b219f85580b8e6a2c6a041240fb19c4aed94296bd4d1
font_01_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 10940 bytes
SHA-256: 973e30ac344a36f072865df8344069ddf89e76dbee16bf3f55e0003bb7b97fc1

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