Malicious PDF — malware analysis report

Static analysis result for SHA-256 a809434df473a64a…

MALICIOUS

PDF

73.4 KB Created: 2020-11-17 00:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1371e7c3d28fdc965fadb15c42929b56 SHA-1: 1f1dd9e21a6553660c789fa71587d21bcda9118b SHA-256: a809434df473a64a63246502775bae30819943a302e214273ca265c0b84fe79d
156 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. 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/123?utm_term=evangeline+funeral+home+obits+new+iberia+la PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5fa474cf705d4.pdfIn PDF document text
    • https://gogipemefa.weebly.com/uploads/1/3/4/4/134471158/kumisedix_rawapojixijidu_rajokodutadifej_gitiseg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f9154983af81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f875806367cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5fa093c6c94a8.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/6829880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420587/normal_5f993690bad09.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://s3.amazonaws.com/gopuze/mexuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c596c3-5406-4ddc-add7-94af5a66ebab/semifutolipu.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/free_to_kindle_format_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e75ae9-b3ea-41b4-bb4a-3fa792aaef9f/jojegerur.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD353 5312 bytes
SHA-256: 936c2ccd138d71d9bb64b14aa12d8c1107463740c8bf3e291aea1fb8557f43e2
font_01_sfnt_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10908 bytes
SHA-256: 1c53de08daa3c8ed72f6975ef1cacec00e7be9608708559a5617b86b8c76cbcd
font_02_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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