Malicious PDF — malware analysis report

Static analysis result for SHA-256 40cb820949481586…

MALICIOUS

PDF

70.8 KB Created: 2021-02-01 06:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9ba9c2525024ad46b8ef7d775334fdd7 SHA-1: 1be5fce2d45eb5f74f0d4eefcd8e2af6a3fbdc51 SHA-256: 40cb820949481586502bd04846d97b9926fcdac82bba130d098ab17ff59de6a9
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is presented as a search result for 'ikea light up mirror bathroom', suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of external URIs and the overall detection indicate a likely attempt to redirect the user to a malicious resource.

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 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://trafficel.ru/wb?keyword=ikea%20light%20up%20mirror%20bathroom PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489588/normal_5febf72fabad3.pdfIn PDF document text
    • https://tanibabinilez.weebly.com/uploads/1/3/4/0/134018029/sobuzalusefud-posatilajakis-penukudeb-tevuj.pdfIn PDF document text
    • https://fezabukife.weebly.com/uploads/1/3/5/3/135345753/2079758.pdfIn PDF document text
    • http://pshcomonhere.xyz/puserugasu1i3wy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_5fdad2f0de80b.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/chhTPHW/dasunivotojiwedazexu.pdfIn PDF document text
    • https://xosofanukofupa.weebly.com/uploads/1/3/4/8/134879033/00e3cefe62976bb.pdfIn PDF document text
    • http://verezitabel.66ghz.com/aligarh_muslim_university_class_11_form.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/e0e4f95e65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadinox.epizy.com/esl_advanced_reading_comprehension_worksheets.pdfIn PDF document text
    • http://xefivaz.epizy.com/fusanupaxugosevelavu.pdfIn PDF document text
    • http://tijepexaran.epizy.com/cuantizacion_de_la_carga_electrica.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_off0000d852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD852 5196 bytes
SHA-256: a07e76e2a3348c703d614e3a291a7c1edd238914b77490a7d79364f22d62a44a
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 10700 bytes
SHA-256: 295e6e0038409f17907c4b324e6f463e6fd6f4b7ae750603b68ee8fb8e73da6e

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