Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c47d930bfad492d…

MALICIOUS

PDF

65.7 KB Created: 2020-12-15 05:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9726bfeab75ed378c198f95dc66de3e5 SHA-1: 253fa3db887d6b516492f4ae45ea33e25aa1dc87 SHA-256: 7c47d930bfad492d4e2ada9372408492c5be78261d0fec5c4395287dbf762c59
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://cctraff.ru/strik?utm_term=aplikasi+fvdtube+apk'. This URL is likely used to deliver a malicious payload or redirect users to a phishing site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious link and the document's nature as a PDF suggest an attempt to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=aplikasi+fvdtube+apk
    • https://cdn-cms.f-static.net/uploads/4483336/normal_5fbaf9bae4147.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc5240da13a450bab0fe7b5/t/5fc9fe601a258d244fe3580d/1607073377273/nwsl_teams_2019.pdf
    • https://static1.squarespace.com/static/5fc374892bbd74065816c63e/t/5fcd9dc7e43f2b00a8c42990/1607310792941/jeduwiboloxeluxiweruko.pdf
    • https://uploads.strikinglycdn.com/files/d69749b9-c1dc-478d-80b6-c5246b64a84e/nimipipuremelavites.pdf
    • https://static1.squarespace.com/static/5fc699d1e2fce462bcb38289/t/5fc95b10583b2c5781eb74f3/1607031569686/applocker_ios_11.pdf
    • https://s3.amazonaws.com/jamokaroxoj/tunopujurizazika.pdf
    • https://uploads.strikinglycdn.com/files/99d1ec2d-f86c-4699-950a-e1c487d32053/6905547466.pdf
    • https://uploads.strikinglycdn.com/files/b940992e-1f78-4a23-9797-54d62a1bbbad/71473789058.pdf
    • https://s3.amazonaws.com/juvetaso/antes_muerta_que_lichita_transformacion_de_alicia.pdf
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc174b31972c46e3cd5f4dc/1606513844445/synopsys_science_fair_projects.pdf
    • https://s3.amazonaws.com/zoromexemuzid/after_10th_courses_list_in_gujarat.pdf
    • https://s3.amazonaws.com/pazifetanegapu/nios_deled_506_assignment_in_hindi.pdf
    • https://s3.amazonaws.com/wemupajese/11999887579.pdf
    • https://s3.amazonaws.com/najubu/fbla_entrepreneurship_study_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c65c.bin
acf6a94f3e584e0990e5ac629f1668e1650425c5d18714445439d6d90ba88d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC65C 5192 bytes
font_01_sfnt_off0000d81f.bin
622bf93e42cf34563abf5dd98d6106e4f52d7f6d9253c8b491401c09bfd500eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 10100 bytes

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