Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd3cfcbd7d009a5…

MALICIOUS

PDF

73.3 KB Created: 2021-02-19 22:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 19e61f5c8390ff3225315f338a9084c9 SHA-1: e8b5b826f8411e0a83a58f2f6025d3111afe3a24 SHA-256: 1cd3cfcbd7d009a55b761643f390681c9fc79977f7e45113017af8d48904560e
126 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 URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The primary URL, 'https://jottigo.ru/strik?utm_term=percy+jackson+movie+series+download+in+hindi+dubbed', is designed to trick users into downloading content by impersonating a movie download. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or malware delivery.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=percy+jackson+movie+series+download+in+hindi+dubbed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452608/normal_5fde35c40421e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_5fe783d93c78e.pdfIn PDF document text
    • https://cdn.sqhk.co/lojiwoxaz/ijmgigh/12291549218.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/cnXtRhf/mazuripodujipudun.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/00317e4d82.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/daEMfeS/merurebomonizokofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_6013ca47e0b4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_6027dbdf45018.pdfIn PDF document text
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/kuluruk.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/ijjfVgh/nujakikexali.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/zalafu_lepanilovi_kefinupexu.pdfIn PDF document text
    • http://roxifij.22web.org/what_is_a_plc_controller.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vikogen.epizy.com/the_odyssey_book_1.pdfIn PDF document text
    • http://lawazujazigefon.epizy.com/10162248974.pdfIn PDF document text
    • http://nogobixa.epizy.com/plagiarism_software_for_thesis_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/android_developer_resume_india.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/vekoneramasexuduzo.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/fuwunezuxoreli.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_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 5716 bytes
SHA-256: d1c23fac029e5f318f1585a5aa511f9bc90820c384fce83bc305e3d7240cb13a
font_01_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 10460 bytes
SHA-256: a8df45e3d245a94182e88c85917a3e2d1efb5006343ec86b830db5e4f664724b

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