Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd058a5c809cb66…

MALICIOUS

PDF

76.3 KB Created: 2021-06-04 08:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4612cc164b0a71f2e1f098abf912a898 SHA-1: b9c825cfc78c9a16d7a073f1650365328f8bb61a SHA-256: 1cd058a5c809cb66d17ac23b4f60cb6d30bf3ed8f4ac6b729c3270068e92c702
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of a URL with a 'utm_term' parameter related to visa applications indicates a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/123?utm_term=canadian+visa+application+form+in+ghana PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fe77443d8056.pdfIn PDF document text
    • https://takixesa.weebly.com/uploads/1/3/4/6/134621412/c33bc64ac773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_605c1690e6ef4.pdfIn PDF document text
    • https://litudawugo.weebly.com/uploads/1/3/3/9/133997631/kafufezixiroke_nojepesuwojovab_davorinepa_xomewutureneju.pdfIn PDF document text
    • https://depoferi.weebly.com/uploads/1/3/4/4/134445349/98100975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_602b9a2b6cc60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_60612b2b6e613.pdfIn PDF document text
    • https://megogolu.weebly.com/uploads/1/3/4/3/134314378/6554058.pdfIn PDF document text
    • https://fibavizenimi.weebly.com/uploads/1/3/4/4/134485548/xijitoligutik.pdfIn PDF document text
    • https://sazizilas.weebly.com/uploads/1/3/0/8/130874530/duwemijosovijitavam.pdfIn PDF document text
    • https://wovebisaji.weebly.com/uploads/1/3/4/6/134687394/d05d221ac.pdfIn PDF document text
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/b093c51b86.pdfIn PDF document text
    • https://puzagetidorijes.weebly.com/uploads/1/3/4/4/134495880/zarogisozo-wepof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452834/normal_5fe175a573624.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/dbe46477b6.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/6cc8ae27-3819-4a15-9950-fcc8c94233e8/ejercicios_de_acentos_ortogrficos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46df32cc-6bc9-436f-9d35-02c11f95147a/emphatic_form_of_shall.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_off0000eafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 5532 bytes
SHA-256: 75228b48d38a2a0cc83f7da77cc2245f156d12100f9a9549247b19f458d59164
font_01_sfnt_off0000fda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA8 11596 bytes
SHA-256: 256420654d97725029ea65be222b540aa633ebdd30eb1a838524ba99c5b19c79

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