Malicious PDF — malware analysis report

Static analysis result for SHA-256 44818ea209556316…

MALICIOUS

PDF

68.3 KB Created: 2020-12-06 14:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aa391512ef04c0c44b5bce598a8a0a11 SHA-1: 1cf34ea3967d910f76328777150e6b469278e953 SHA-256: 44818ea209556316cfb98bb03a8e89542d3c02d4b05d960b7cc0bfd29c091816
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external resources, with one identified as a malicious redirector. The heuristic firings indicate a PDF link farm and a critical ClamAV detection for a phishing trojan. While no scripts were extracted, the presence of malicious links and the overall structure suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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.
  • 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.
  • 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/aws?utm_term=soil+texture+hydrometer+method+data+sheet In PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/bb427ecff126227.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/4401886.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/varefi.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/5fc595f040f1034a5cc8b612/t/5fcc8c7e33187724c4ebbc59/1607240832677/kafupad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be160bf-7d9e-482b-87c9-d0e4e54607b3/wamamarazaxonuvujogojoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b348bd5-9251-434a-a02e-63d6cefb5a7b/trivia_crack_hack_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84a0ab5-e1aa-4cd8-a3d8-1144dfcb1121/xawitulizaturojiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491b1944-665a-4471-8253-f9fb507f0f0d/55928644521.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51b218e72e5fdbce580d/1606373810384/9995648687.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/40091223227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/539404a8-4268-4af4-b22a-86b0aac57ef1/amsco_world_history_ap_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e335a5bc066edfa5a857/t/5fc146379b1ed035380ac077/1606501944863/93903049772.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/bose_cinemate_120_manual.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_off0000cc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3E 5336 bytes
SHA-256: e50777999a8790de8e546eae907624e09d24545cfc31c69eff5bc7a26bb301c2
font_01_sfnt_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 10812 bytes
SHA-256: f20ede192678f3d3b8c076449aa94580ae0a3587e1a9cb50b1f5fcd19939c5bc

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