Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2135ae429ac914…

MALICIOUS

PDF

64.9 KB Created: 2020-11-14 11:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d2afb290358ec3f2b6815838b28387cd SHA-1: d842fddd6b504eb2f2ee9892f39237d35392d6dd SHA-256: 1e2135ae429ac9141e158a0454e3898bf30fe6c9a4922422eb80d6651e3bc22d
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 0.9998

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
  • 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://traffnew.ru/aws?utm_term=reference+writing+software+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5fa39ff99492f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452171/normal_5fa549153e0aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5f99dd1d6ca7f.pdfIn PDF document text
    • https://gimogelego.weebly.com/uploads/1/3/4/6/134601730/4183365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452173/normal_5fa9c18b589f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5fa538e9e116b.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/ba234cbc-1968-4dcd-ab2c-c73fc8021969/87854305851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cc6556-5ac9-4296-905b-5891969049c0/pogesabanafabiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca24663-4a1a-4115-aeec-ce16ea258e7d/magic_jigsaw_puzzles_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f5a66dc-d00b-4701-a0ff-a9ad3f7df95e/mukuwepudibalexozule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db3b3ca-78ae-40ef-b664-bdaa1ebd7c9c/compilers_principles_techniques_and_tools_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1b3c00-02df-456c-9c61-a64f116a2c45/watigowinomixafuno.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DC 5116 bytes
SHA-256: 163b56f1cef9cdf43df6fb8eb23f52d7eb1d21c9e00ca8d2705f7bdb18aa1a13
font_01_sfnt_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 9836 bytes
SHA-256: 95d5e56fa9f79bfb4625260be3acb39681352ffb73f537c7888582a18dd34eca

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