Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9492f23960c3048…

MALICIOUS

PDF

80.1 KB Created: 2021-01-14 23:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f3465d41eef2ff1ad37ba87fb040e6ca SHA-1: 2d45877cef4c387ccb31297aa9a1bf2867089581 SHA-256: e9492f23960c3048b08e864f0801cb3b1b4aed3e6c84301d294ec48498aca9b0
222 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 'traffking.ru', which is used in a lure for 'Showbox apk app for pc'. Additionally, the PDF hosts a link farm with numerous external PDF links, many of which are hosted on S3 buckets, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://traffking.ru/123?utm_term=showbox+apk+app+for+pc In PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/zupum.pdfIn PDF document text
    • https://gituwelogasof.weebly.com/uploads/1/3/2/8/132814340/kenukodegakad_nuxixavedof.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/sejoxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5fc60f8624ec0.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/946a9e1a6fb0.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/X7CcQig/prison_break_cast_nika.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/jasadavebaga/avast_antivirus_offline_update_file.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/begatixenurivage.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/arcanum_unbounded_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/mizebozure.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/kamimijagad.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/12748777479.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_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 5360 bytes
SHA-256: 280cc964bf44ff3f0f26c369b713994894efd8defbbb65258f105311526b7954
font_01_sfnt_off0000f8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D8 10864 bytes
SHA-256: bc4c238d9f702e8674c4a71fbb1e347e32f787ee03850c89f21139609c348b32
font_02_sfnt_off00011df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF3 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1

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