Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bec0840d80e0b6…

MALICIOUS

PDF

76.1 KB Created: 2021-02-24 11:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2bc31a7213f5d5cf0e52d48fc0f95323 SHA-1: 20ed7ff7872c846c19af84f5eb202e350bbafbb1 SHA-256: e2bec0840d80e0b6f21c317cb85fc751068e60873a861941a5404303d18583a6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate a high likelihood of malicious intent, possibly for phishing or SEO link farming. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

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://yafferge.ru/wix?keyword=chords+and+lyrics+to+wagon+wheel In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_60198012daede.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/6a03c33a7830a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_6031048d18e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_5fd92f3ecac50.pdfIn PDF document text
    • https://witokilufixag.weebly.com/uploads/1/3/4/7/134739393/ef72857b9e148ee.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/gadibawuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_6019827c730eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473445/normal_603561884f3e7.pdfIn PDF document text
    • http://akmurzina.com/diserekejuf5n45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_5fe81902cca00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_60334c1b4eee8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lupewozer.rf.gd/how_to_do_hobbies_in_sims_freeplay.pdfIn PDF document text
    • http://lodibusalibazi.epizy.com/blitz_the_league_ps3.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_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 5300 bytes
SHA-256: 597339aad8901834a96f92f0afd513c9db8081fd7fb36bf679cf6e05f2327a7a
font_01_sfnt_off0000feb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 10720 bytes
SHA-256: ba6868c33adbe0d7afd09f4e8957425cff45165a829b92c713646e7ae08692a0

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