Malicious PDF — malware analysis report

Static analysis result for SHA-256 42536a896d6009c7…

MALICIOUS

PDF

75.6 KB Created: 2021-02-26 08:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cc578dd6829cfb04c3d0de07e1458587 SHA-1: 1abd18cc30291dfaf02862523e223133f5981775 SHA-256: 42536a896d6009c724b41db0372240aafc4cfa6f0e4a5eeccb52e955111cabc4
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to 'Casio watch 5081 price', suggesting a phishing or scam lure. The presence of multiple embedded URLs and the link farm heuristic indicate an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=casio+watch+5081+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_600ebc092622f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fd1d3882df37.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/epson_v370_perfection_flatbed_scanner_argos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5ff7716a6cf1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389586/normal_5ff0d1cf1c800.pdfIn PDF document text
    • http://texuxetikarobu.iblogger.org/7039791112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482424/normal_601a555897ae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416939/normal_5ff1f339a4aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_6011c1faf3232.pdfIn PDF document text
    • http://futudobofexile.iblogger.org/723745693.pdfIn PDF document text
    • http://vatologox.iblogger.org/44235848440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jozetej/2019_technology_salary_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/picsart_modded_apk_onhax.pdfIn PDF document text
    • http://juxawewoguseku.epizy.com/71344663121.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/97212997451.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/rilunubopobasawodomeduf.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/what_is_the_impact_of_globalisation_on_indian_economy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 2872 bytes
SHA-256: 54039359e6be39c510c26923debdf4fe211c44dba2189869b1e5319af292baf4
font_01_sfnt_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 5500 bytes
SHA-256: ffb71562722b95c2dc0251b36bdfe80bf699b360e4ee84c9d1201fb105ffd049
font_02_sfnt_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 10648 bytes
SHA-256: ee5075a151310941e2452801f640ed25b756b82ae483bf93f6212d3688282933

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