Malicious PDF — malware analysis report

Static analysis result for SHA-256 9242739115e787b7…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 06:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 34fe9088145eb2a2c133b2e50f060d2c SHA-1: 1d4997f6f31c1d5bf888e8b999326cce61fc55c2 SHA-256: 9242739115e787b774aa59ac3524524a169888055ffc2fcded8096401f1e8704
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://crophysi.ru/strik?utm_term=how+does+cyberpower+surge+protector+work', is likely intended to lead the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+does+cyberpower+surge+protector+work In PDF document text
    • https://static.s123-cdn-static.com/uploads/4385197/normal_5ff698a099823.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471711/normal_5fe04109657f3.pdfIn PDF document text
    • https://navubuxodogonid.weebly.com/uploads/1/3/5/3/135327143/f50d3e1b8.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/xutugopisavir-pemozizinak-fotorujavi.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/zulimupegubawunanib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_60216e7a96ad8.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/5162336.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/sapexajezuzijef-vubuzejux-tapovokunosur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_5fea1ee902984.pdfIn PDF document text
    • https://nibotilujegaw.weebly.com/uploads/1/3/1/3/131381886/db78294e.pdfIn PDF document text
    • https://ludurodeb.weebly.com/uploads/1/3/4/8/134852143/togiripaveto.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/zamemigojat/18808332967.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/anticoagulant_perioperative_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/tuwupuwopagujubujulugil.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/gy-_neo6mv2_neo-_6m_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/wokeposo.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/63345719183.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/bekebifasenaru.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/how_to_get_a_law_degree_in_the_uk.pdfIn PDF document text
    • http://kojodidekojamu.rf.gd/watexinuroxeviredu.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_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 5360 bytes
SHA-256: 24babb3c0bce13bad5d3c0ceb7cf7dd9d5fb0beaf7e419ecc888450d29191f46
font_01_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10480 bytes
SHA-256: e36865c673bbd55718c484a7a69233969c5ecc071b1db1cb9ea81f70efd99898

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