Malicious PDF — malware analysis report

Static analysis result for SHA-256 b970b85b432025fa…

MALICIOUS

PDF

65.0 KB Created: 2020-11-21 06:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c80c510dd3f815b18198999235928805 SHA-1: 92a4512a0927c4f69f4ad473e1b738556bf49566 SHA-256: b970b85b432025fa323dc637a02cee5cb35697030c6e424294a4649749af8457
162 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://traffine.ru/123?utm_term=2009+audi+a4+2.0t+quattro+service+manual'. This URL is presented in a context that suggests a lure for downloading a service manual, indicating a phishing or malware distribution attempt. 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/123?utm_term=2009+audi+a4+2.0t+quattro+service+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_5f99312d9afe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fa1efcd0591c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fb871e7ed9e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f936bfe758f1.pdfIn PDF document text
    • https://wipiduwofudozi.weebly.com/uploads/1/3/4/5/134588456/5607d9108a.pdfIn PDF document text
    • https://kozipizifepawu.weebly.com/uploads/1/3/4/6/134631686/9a7acdbe4930a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5fa6badc4aa21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11f6849-fd96-4d49-a471-7c8fd81bed0e/pejumokujimisobu.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/dialectical_journal_template_download.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/lupaduwimidejezotew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b9df06-9962-4bb4-be04-bd99cdb5d5d0/62501749856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e0854c-16d2-4e5c-b22a-fb0e701b7089/katakimudafelasiw.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/hacked_plants_vs_zombies_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/app_for_laptop_windows_10_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/perepijivekut.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_off0000bf6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6E 5724 bytes
SHA-256: 73a2ee5de22a28dcc4eb3e41cb79602573a516eac09e210249e588c3251bf6de
font_01_sfnt_off0000d2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DC 11332 bytes
SHA-256: a5351c93f1c2ed1f0649287c5d5ae1de620b8d460b2e320bae91823d13488804

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