Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9547794e3ab7df5…

MALICIOUS

PDF

78.7 KB Created: 2020-12-18 14:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 12fdd48677baaeed64bd8a8c798b47c2 SHA-1: 2de7b811a5cf4090e8ef06376a1d485be10b823f SHA-256: e9547794e3ab7df5e048cb7b93d493c53b656e9462bc96a34a38ecdb01adb4ca
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The heuristic firings confirm the presence of malicious links and a link farm, suggesting an attempt to distribute malicious content or drive traffic. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to trick users into visiting harmful sites.

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=msi+g31tm-+p21+bios+update In PDF document text
    • https://fijefozumomaba.weebly.com/uploads/1/3/4/4/134491855/d0b23cbcd7.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/3068025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_5fb94c21e158a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_5fc096a19cd38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f93d674650c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fa500c145a0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5fb8bf8bb408a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f881e7498b02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f8765eb96670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5fb68553b1968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fa3511f4c283.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4637130b-5c4f-4375-b965-165baec903fc/haven_season_5_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfcfb49-e7fd-4c9d-a764-b7c74b2e49e3/lesawenose.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/human_body_physiology_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178d33fb-02c7-4958-b69a-3c759539d57a/xezijilaseduwikimowuvir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2966c530-1564-4654-bb60-5cee0c736fa8/the_winning_brief_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DE 5452 bytes
SHA-256: e3f850bc7528ea80cf2d7e301409214751f1f57ca97ea72441dad1d77e58cd7b
font_01_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 12988 bytes
SHA-256: 219a138f61cad7a52e166ce103214d3c54e33bb57443d172582f0b59ca1c2a10
font_02_sfnt_off00011d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D31 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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