Malicious PDF — malware analysis report

Static analysis result for SHA-256 532ccf1b7dfd9f75…

MALICIOUS

PDF

74.5 KB Created: 2020-11-17 21:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 01ec56a18775b5c01aeff272669a4713 SHA-1: d896b71e0248d8a0ca7c6ee1446569cf9d6835a5 SHA-256: 532ccf1b7dfd9f75df8f0dc9d8ab0f89936365687d86ed8006c9f24298d3d9c3
214 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 and routes users through malicious redirector infrastructure. 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
  • 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://traffmen.ru/123?utm_term=legacy+of+discord+mod+apk+unlimited+diamond In PDF document text
    • https://lavofimezifo.weebly.com/uploads/1/3/4/3/134341346/1291763.pdfIn PDF document text
    • https://ridivuxizoram.weebly.com/uploads/1/3/4/6/134633738/lutiweje-tagoram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8bd43539f02.pdfIn PDF document text
    • https://nubitewubol.weebly.com/uploads/1/3/4/3/134385952/semozaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f9dbc6374d36.pdfIn PDF document text
    • https://rimibike.weebly.com/uploads/1/3/4/6/134636102/lulijinoxurawegifat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5f98a197974e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f912f1a30736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f88f6f32de5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_5fa23b04e604b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f874a129c12d.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/kavitokolezub/ccna_course_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3acb4894-52a4-4b0a-81d1-39c1e10a3f45/sony_tv_repair_walled_lake_mi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7ba47b-eed0-4402-b8fe-efcfc6ec2984/panasonic_sa_pt170.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_off0000d064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD064 5584 bytes
SHA-256: 97c46ab80e498345e6a8df0f7a84d72631d308a4ae526dd5fff71cf78c683e2d
font_01_sfnt_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 10072 bytes
SHA-256: f1bf9183454097884646da671c54e6c4424cc51b23ba5655a1e229288f99c55a
font_02_sfnt_off00010626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 16448 bytes
SHA-256: 2de8c140cfb54d21b65354f8c07d73c7267a3be1a336f1c17d9a68d0e5cad3b1

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