Malicious PDF — malware analysis report

Static analysis result for SHA-256 a666f4b2f0ed7442…

MALICIOUS

PDF

77.4 KB Created: 2021-03-25 07:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4377d4ad2debecef3819b2dde6526405 SHA-1: 8e8b0b122c50c7ae9b6350d390fc6bd43ac818e2 SHA-256: a666f4b2f0ed7442b537149a64e8c7e37ac658d7df944d28a9bb915f2048c616
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=brine+shrimp+lab+independent+variable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390328/normal_60102db8793d3.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/39518362203.pdfIn PDF document text
    • http://dimax-matrasy.ru/blackberry_classic_2020_buypv9sm.pdfIn PDF document text
    • http://catsism.com/casting_crowns_only_jesus_videorht9p.pdfIn PDF document text
    • http://skidki-day.site/audi_a4_avant_manual4z3pq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_6025c6ea44b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_6037ca02d19e9.pdfIn PDF document text
    • http://im-marceting.site/dokoto0klvm.pdfIn PDF document text
    • http://wajobok.iblogger.org/sky_movie_action_tv_guide.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/be830d89-678e-41ad-9003-b17426ed9f20/jugevixufufarukogemigofi.pdfIn PDF document text
    • http://fejuzezoj.epizy.com/dufisidu.pdfIn PDF document text
    • http://kavagisere.epizy.com/54752535021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695f38fb-0a8e-4f62-b715-0cbacfd58b02/keputuliresopuraxabid.pdfIn PDF document text
    • http://tafisikakilusip.epizy.com/19215454319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a14191c-396a-46d4-8c30-ea1776550099/mitsubishi_hd_1080_tv_reset_button.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/65356890637.pdfIn PDF document text
    • http://podaviloridi.rf.gd/felusuxatub.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/jigsaw_template_20_pieces.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f355ce72-82ec-45d3-8c04-74b0c19498fd/how_to_write_goals_and_objectives_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2e941a-e3e4-4a8f-b763-abc94b138290/4th_grade_math_curriculum_free.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_off0000e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 5448 bytes
SHA-256: 3797d901275b18f4a4aa26a64eeb81fd9f95fc95d382721cab93d5a9e52de3c7
font_02_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 10848 bytes
SHA-256: 862e5fa2286faacd9162aded0056e74ef58aa68dc69eb1bff960424d1b2c14c4

Open this report in the interactive analyzer, or submit your own file for analysis.