Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ca7a8df4b442e4…

MALICIOUS

PDF

71.4 KB Created: 2020-11-27 05:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 79c0f62272cb984e6667e45365bab858 SHA-1: db8533877ed3fc68a61a053ad5d855d3eda11174 SHA-256: f7ca7a8df4b442e4787a2a380596fc87523746d0f24480647def63c54c893571
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded URLs, one of which points to known malicious redirector infrastructure. The presence of a 'download button' heuristic and the ML classifier's high confidence score further indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to trick users into downloading further malware or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=hill+climb+racing+hack+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fa716bc4c980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fa6d274328c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5fc04d8c63c8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_5fb3dd820de5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_5fa72a8b041ec.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/libidunudizezipobu.pdfIn PDF document text
    • https://petugureb.weebly.com/uploads/1/3/4/4/134445868/wedobejinijogogiwow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f959ed922ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f9b0866d7b98.pdfIn PDF document text
    • https://vijosiza.weebly.com/uploads/1/3/4/7/134746498/9346559.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/6b2478a7-ce88-47c0-9523-f27e9bff7170/98939472102.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/cold_war_events_and_policies_chart_answers.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_off0000d985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD985 5568 bytes
SHA-256: 0e398190deff566693f30bbf0da09945eeb0a5eb5ec689a9072beddc6c15bfa4
font_01_sfnt_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 10876 bytes
SHA-256: 6f8c33f19d6a6d13afefb0b18bda3a0ef3e39ffcdf6518f5c2102730e2d5e209

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