Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca11a9b9c64286f…

MALICIOUS

PDF

76.7 KB Created: 2021-03-21 11:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: e70c10004d6c0ae5ddc24426510460a2 SHA-1: eaaba8c2bf5eb0d356027c32597e639ff55de9f8 SHA-256: dca11a9b9c64286fa0b146851d80fc443e2b5f1d1a134f85769a3bf18f71c2ac
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or redirection scheme to deliver malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/wix?keyword=congregation+beth+israel+houston PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426816/normal_601208abaa742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_604cb524adedd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454179/normal_5fc891967b7c6.pdfIn PDF document text
    • http://romomikas.22web.org/sedewovitejoxubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383464/normal_5ff1d2c5ba680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497348/normal_604cc45f94d0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5ff7ca7d4e525.pdfIn PDF document text
    • http://bigswinner.space/7561135246039q5i.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/1306373102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_602b61536b3fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_602626c742f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_603edee749619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_60558efb1187d.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/vixipineteviba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_604ac87cefe57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_6012093506937.pdfIn PDF document text
    • http://axecheat5.xyz/jeromikaduxetuger5olx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_60489f5c325b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fe7bfbb32cbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5fee17059eabb.pdfIn PDF document text
    • http://goshop32.site/safety_glasses_for_covid_canadag7ych.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerezusilanake.atwebpages.com/safety_1st_car_seat_adjustment.pdfIn PDF document text
    • http://kifemulawej.epizy.com/70459263551.pdfIn PDF document text
    • http://defakulid.atwebpages.com/logitech_g_saitek_x52_review.pdfIn PDF document text
    • http://fogovulosuzan.onlinewebshop.net/73785896446.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_off0000ecf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 4992 bytes
SHA-256: 5028a77689f37839c48df8d8e75bcdcb75f655d1b3a2cfe8692d9092fe8aaf0f
font_01_sfnt_off0000fde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 11444 bytes
SHA-256: 95d9064d06de5cd24d7580184e9d4d315ee0f2ef06e78b6fad04dc3ef1251568

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