Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd6f314662f89ca…

MALICIOUS

PDF

80.6 KB Created: 2020-11-10 13:25:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1b26ffc914b73a54b520875460a339da SHA-1: 1ec4ce641426c9dc25c77a46d377b10604e35112 SHA-256: 6fd6f314662f89caf0e64e065135bb0598a330d2e2fabca8527a73cd65560d47
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 0.9997

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?keyword=deadpool+2+full+movie+123movies+hd In PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/1117b7707bc2.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/7f60432723aa63d.pdfIn PDF document text
    • https://digulowewuw.weebly.com/uploads/1/3/4/3/134363346/beregetaw.pdfIn PDF document text
    • https://debaduvevuw.weebly.com/uploads/1/3/4/3/134383420/kojinurukawo-rugopekubuxe.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/tadovu/national_anarchism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcfbf78-675d-4da6-bea4-7d7c85175539/novijajibopowunuvup.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/sekedelijila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477a596a-93c5-4c20-946c-ec192ef6e732/30416510988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8056122a-d379-43f7-80e7-c2d8a08b3a53/395419159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0004d35b-530e-4d0a-be02-79d6d7aa25db/13135657461.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/62971238545.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_off0000e747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE747 5592 bytes
SHA-256: 709d9e8ba9dfdd13ab651117a8a81ec9198130f961e0f300d442c40e5047aed6
font_01_sfnt_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 11088 bytes
SHA-256: 94a85b0266dc9e417a322693f5ecae33c93cc4237b43f8783bcf5b160d550b3d
font_02_sfnt_off00011fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDF 16228 bytes
SHA-256: b6c810dd36a0fd0a80f5a112b6fb0000574204cc4dcbf42ac1dc212a4103410e

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