Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24fd801afbb7785…

MALICIOUS

PDF

68.2 KB Created: 2020-11-24 16:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0aeae3027f8e2424af9cb15cd9c6b1e6 SHA-1: 76f3a61d5a9c31569bff9b8df4cd56183e3f2e7c SHA-256: f24fd801afbb7785cd00543366a9ccb37aef6b9517e9e2e7418e05ec46369a16
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is identified as malicious, employing a common phishing lure technique where a screenshot is presented as the document content to entice users to click on a malicious link. The primary malicious URL identified is 'https://traffking.ru/strik?utm_term=virus+webquest+answer+key+biology', which is flagged as a known malicious redirector. The document also contains a large number of embedded links, suggesting it is part of a link farm designed to distribute malicious content or traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://traffking.ru/strik?utm_term=virus+webquest+answer+key+biology In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5f90aec7361c6.pdfIn PDF document text
    • https://kubamugikogili.weebly.com/uploads/1/3/4/5/134508843/7238133.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/lupidud.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/faxajowol_ziwonulogowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5f8ad2bd08607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f8f4c290b785.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/wuzalugiseto/40281147356.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/41928170395.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/dolphin_speedometer_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/31179399052.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/95657723096.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/appalachian_trail_guide_to_new_york-_new_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/pca_competency_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/nuclear_isomerism_and_internal_conversion.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB310 5344 bytes
SHA-256: 35683eef3cc4d7afeace641d3bf61c939f0569a17905f1247a0a3575ef89dc82
font_01_sfnt_off0000c569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC569 7632 bytes
SHA-256: 59449570d6cdf14953e9a654b2ea17a052106db6fc183a4e89b879fd524315b3
font_02_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 20668 bytes
SHA-256: a2ee5f3d3d4b911d3d576d9f33790fb1d22a3cd503e7ddf3c44b6a02e6a99e52

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