Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ed3e70f5e18e48…

MALICIOUS

PDF

71.5 KB Created: 2021-05-30 02:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3ff20f2c78695e7e733fcf9156c0dad8 SHA-1: f1598a26e43cfa9b367343a089993939fb4b8e66 SHA-256: 65ed3e70f5e18e480f60ec20c41d31dd696c06a20c3721400eaf9a65e95bbb20
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the final malicious destination. The ML classifier also assigned a very high probability of maliciousness. The primary attack pattern involves luring the user to click on a link that redirects to a phishing page, likely impersonating Apple to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://runobutadafe.weebly.com/uploads/1/3/0/9/130969205/bekur.pdf.
  • 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://mezovuduw.ru/strik?utm_term=the+outsiders+chapter+1+and+2+quiz+pdf PDF link annotation
    • https://runobutadafe.weebly.com/uploads/1/3/0/9/130969205/bekur.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/1d7593304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452377/normal_5fc5afe65f81d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5ffa01047e035.pdfIn PDF document text
    • https://kivijakesav.weebly.com/uploads/1/3/2/7/132740669/japezag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404313/normal_5ff55b78c3960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462368/normal_5ffa9625045b9.pdfIn PDF document text
    • https://bogigevaruzo.weebly.com/uploads/1/3/4/4/134435623/244020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_603754c1173ee.pdfIn PDF document text
    • https://fusewire.weebly.com/uploads/1/3/0/7/130776481/welobixuxoga_mejawebaw_jomegoju_pipip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_60686472136b6.pdfIn PDF document text
    • https://fekoguto.weebly.com/uploads/1/3/4/4/134491689/2b36c260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_601b457222dde.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/8700637.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/7778126f-4b11-43e1-889a-b5897d8695b4/an_ember_in_the_ashes_series_age_rating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f8ee327-17d3-4864-b123-e9d6ae220c47/lufutofogotinakenepusipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa5e2c1-0dc1-4668-b23a-ae6dec4b0390/15616138652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c908ab39-eb3c-4081-986a-4736e29ee615/why_decision_tree_algorithm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425df76b-e929-4066-8175-27ee8c7727e9/simcity_4_cheats_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e089e995-e751-4341-9307-92c1c0c36bc5/17020750395.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_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 5520 bytes
SHA-256: 4b30ace885431f1e3ffd331481e7756898f8facad1de68cb1a66acba764d351a
font_01_sfnt_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 11000 bytes
SHA-256: 5460fb1138fb9b540b0e23c92df35027e0a8da05e43018c70cf145546314318e

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