Malicious PDF — malware analysis report

Static analysis result for SHA-256 5653e6f46282af30…

MALICIOUS

PDF

74.2 KB Created: 2021-03-16 04:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 28b0cf020182c379d2a667d8c47fad33 SHA-1: 9f180508fedf0cdff3d2b294b21c750b86dc9008 SHA-256: 5653e6f46282af30d9ff5edeae692abbf4306bd0a8f2a7b49c0a6de7bddae127
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'fokemale.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on disposable domains, likely to distribute malware or facilitate phishing. No scripts were extracted from this sample, but the overall structure and URL findings strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=bangla+book+pdf+download+site PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404524/normal_5fe59874a5154.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/94922350183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_601f7f2e431cb.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/exadata_database_machine_administration_workshop_ed_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_601a9d81b2220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_6048c84585e40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454544/normal_5ff96124438b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_60376866a9200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485818/normal_6024b204521bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_6016fdcd91544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_603632f9452b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496381/normal_5ff3cfae8bc1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_603977d10f62a.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/70ddfa55-041d-4662-b4a1-8aa5ec77a13d/rilomebufetitexaponitiki.pdfIn PDF document text
    • http://wonumamirevaz.rf.gd/asphalt_8_hack_ios_no_survey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6657264-7f20-469b-8cf5-0495baf8f710/58655264401.pdfIn PDF document text
    • http://bivatirovasivoj.epizy.com/84577891061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219093bb-e709-4dfa-93a1-341808bfb5fe/fowexubaloburikamugu.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/curriculum_vitae_sample_kenya.pdfIn PDF document text
    • http://zokazeza.rf.gd/joint_fleet_maintenance_manual_volume_2.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_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 5460 bytes
SHA-256: a1ef0d69975ff005b79524f15074e6a421ec4a050344094c658e5d2374e2385d
font_01_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 10176 bytes
SHA-256: 5619e39f51bf28335b8cbc6230a20f047c846c99661476e6696c3558f7429b78

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