Malicious PDF — malware analysis report

Static analysis result for SHA-256 e382932e328c0bc6…

MALICIOUS

PDF

69.8 KB Created: 2021-01-09 16:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ccde372d54d91ec7b4703682e0e26f3b SHA-1: b6e6636202f5d3c4bfef53d7bb42f8da5c2f23be SHA-256: e382932e328c0bc69e40de934f80f4f065b5364805c40fe3ce70ad1de0dfdbbd
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 large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=yankees+season+tickets+behind+home+plate In PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/9439341.pdfIn PDF document text
    • https://rufuwoja.weebly.com/uploads/1/3/4/7/134735928/zugado_sagoko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5fe3948390c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f9cea5eb3342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5fe95bb129f87.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/351c43db-d302-4437-86ee-ee5daafa6ab1/fortnite_hidden_n_location_chapter_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bccb4eb-54e9-4496-a640-2446e442ea11/nerigunulugemolafikegatok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8330ddb-accf-46e6-ae72-424fe7548810/antique_chess_sets_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/24050465058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44c5c13-2d70-49fa-ba38-d37b6bc0bc40/wadigefasuxekadeninexu.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_off0000d2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DB 5384 bytes
SHA-256: c272a9f1a03d33ed5ae449ce9a63a3c97300fe8c1f8524aca9020d58d2cccff0
font_01_sfnt_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 11180 bytes
SHA-256: 73ea0dad99dd94449de43de710b31b3bcf3d0fd394518fa57884de98b5fd1a79

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