Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae41849ba1a8f37d…

MALICIOUS

PDF

68.2 KB Created: 2020-12-11 10:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 19991f0af22847b8cf43681881ff965f SHA-1: decfaeaa4b1f2ed25fbb2919e2ed12090d18dc98 SHA-256: ae41849ba1a8f37dd4082619176cf2d57db24f76e20f68ce1ead82d4ae4159cc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=duval+county+public+schools+calendar+2013-14 PDF link annotation
    • https://doxibizogo.weebly.com/uploads/1/3/4/8/134893922/c06033fa4.pdfIn PDF document text
    • https://tumogifizutuvo.weebly.com/uploads/1/3/4/5/134527103/1127056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443617/normal_5f9f0fb178a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487665/normal_5fb462e8612ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe099418e72e5fdb9df916/1606289817765/43989728343.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2bd98403f5353fda1b0ca/t/5fc71438b7521d608a3dce80/1606882363391/21447678176.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ad3c92c50b1a1e980d73/t/5fce09d62bc7884852db505e/1607338455208/51036560793.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13d0827a199023ab79d37/t/5fcb572b26a2be7f6de29719/1607161643600/human_fall_flat_online_multiplayer_switch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd072264be903ae641c13e/1606223651175/didoneti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce35f071251b5e49a080ed/t/5fd14ce4883d280c3e304ab1/1607552228666/head_ball_soccer_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc62bd6-44a3-48d0-908f-1eb2df93c9a4/yankee_stadium_bag_policy_suites.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_off0000c9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C0 6072 bytes
SHA-256: 8f6295df596396fb6c903016fe3b0d691bc07dac775bb8cbdcb5d66b7e86dd9a
font_01_sfnt_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 11292 bytes
SHA-256: 3711c7851d6e2d69f270da3a93445f62d4474c6bca409cf2e861236fd655fb33

Open this report in the interactive analyzer, or submit your own file for analysis.