Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a4fadf9b98cc5d…

MALICIOUS

PDF

74.9 KB Created: 2021-02-20 22:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0f87cd91a77d06fb221e58ca4df52e5b SHA-1: 244623c866ae8b6f79d08874dce725c030553720 SHA-256: e9a4fadf9b98cc5d1c749f58c645312d07957042527e2c319dfe61808fb8287d
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=how+to+check+airtel+net+balance+4g'. Additionally, a high-severity heuristic indicates an MFA lure, suggesting the document is designed to trick users into providing sensitive information or approving fraudulent authentication requests. The ML classifier also strongly flagged this PDF as malicious.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/wix?keyword=how+to+check+airtel+net+balance+4g In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_6016457e8dd7c.pdfIn PDF document text
    • http://vovality.club/velopevaterumorcjn.pdfIn PDF document text
    • http://evakuator-uga.ru/lilibinokuxuvubufedzl80r.pdfIn PDF document text
    • http://ver-alex.website/barbie_tingz_mp3_downloadrq4yx.pdfIn PDF document text
    • http://shopyou.online/categories_gramaticals_exercicis_primariahhdtn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_5fe7dc939db64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369654/normal_5fc9b8c434435.pdfIn PDF document text
    • http://top-agent.ru/11236503525phvg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenamumiv.rf.gd/28493261699.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/why_is_civic_important.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/arabic_alphabet_flash_cards.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/85216467570.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/56959316612.pdfIn PDF document text
    • http://pavasokunise.epizy.com/wipiboza.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/acdsee_pro_8_crack.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_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 5228 bytes
SHA-256: 9acb60df8ac67ec639cf501e76f13a317b42e97e50b25a49ca8691e8181f4c21
font_01_sfnt_off0000fb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 10224 bytes
SHA-256: 69c905852ad897a9fafa4210a86340f02fd53800857a5139c616773362f2eec2

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