Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e21677d6d7536f…

MALICIOUS

PDF

81.4 KB Created: 2021-01-31 11:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3776ecbad55beaad0e78b26e254da78e SHA-1: e1295b4211eedb228d4509a23d0398ae3fa81222 SHA-256: e2e21677d6d7536fa15c0e0df09c65e9a7e8911bb118a528cbb168018d9743db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://druttle.ru/123?utm_term=sesshomaru+inuyasha+daughter', suggests a potential phishing or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=sesshomaru+inuyasha+daughter PDF link annotation
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/3289249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5fe94ff9a4af1.pdfIn PDF document text
    • http://soxitezi.iblogger.org/zevudenaridaxil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_5fd60f02ca1be.pdfIn PDF document text
    • https://jawifeguviweti.weebly.com/uploads/1/3/2/3/132302916/9240587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465018/normal_5fe5e53fa6e4a.pdfIn PDF document text
    • https://nuduxojobiri.weebly.com/uploads/1/3/4/6/134629521/jewewu.pdfIn PDF document text
    • https://zunurevupuvofas.weebly.com/uploads/1/3/1/4/131438471/1715361.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/pulujolatepuv/vofifiwuviluk.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/gejopugomifewude.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/login_form_html_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/rovobavusariwowano.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/fanusijunuxezubebuk.pdfIn PDF document text
    • http://girupesoja.rf.gd/ardx_arduino_starter_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/34932046907.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/34484864545.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/1002419706.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/early_learning_coalition_miami_dade_income_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/5669836057.pdfIn PDF document text
    • http://lepetape.epizy.com/97841801273.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 4228 bytes
SHA-256: 2d52514711206cf6cc9c8c4099e906869b437a93e498471e0e677794b8a1d7ca
font_01_sfnt_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 5412 bytes
SHA-256: aaafe5c7eec5040bb143e767c19fbb724dcc81b1a123bbdce6853d9b02b18cd7
font_02_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 11556 bytes
SHA-256: 10e3fb3b409fea0127dacdc6b5e12a0ebd67ff4810181342d7febc82b3ea4759

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