Malicious PDF — malware analysis report

Static analysis result for SHA-256 599bc7ab3fd1d82f…

MALICIOUS

PDF

73.5 KB Created: 2021-04-05 12:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e28d3471f1a237793ce5c288178e6145 SHA-1: a8f45c0042c0e726cea42496b47d5a227eba7cfc SHA-256: 599bc7ab3fd1d82f302c10d8a51493692e9ea0913f6f157c4fa0dd805f56313a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links pointing to various domains, many of which appear to be disposable or used for SEO manipulation. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a link farm designed to distribute further malicious content or engage in SEO abuse. The presence of multiple unknown URLs indicates potential distribution points for malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lazumuron.weebly.com/uploads/1/3/4/8/134863931/bewawuxemoxuzaj.pdf In PDF document text
    • https://cdn.sqhk.co/tororukiwuri/ic9Thhw/ridawafegu.pdfIn PDF document text
    • http://parkji5x.xyz/start_your_own_podcast_on_itunesrq6tb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366331/normal_5fcf70c867cea.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/gi1BDjf/8189218117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5ffcb21679791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5ff16cc88dc16.pdfIn PDF document text
    • http://alexandreablog.com/zewolivogutogozosisia3m8.pdfIn PDF document text
    • http://1offpark.xyz/why_is_there_no_sound_coming_from_my_subwooferx2bmo.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/Wjhjiic/tailbone_cracks_when_i_walk.pdfIn PDF document text
    • https://cdn.sqhk.co/kipasewimoni/XBFiczG/game_dev_tycoon_ios_guide_sliders.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_60135cb18dcdd.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/OwhaWgc/lozizi.pdfIn PDF document text
    • https://ruregojuze.weebly.com/uploads/1/3/2/8/132814589/7970425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_6049f03c62c1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_6001c46c91fdb.pdfIn PDF document text
    • http://20970907.net/acer_monitor_power_button_brokenctzy9.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/cmgfXhi/givuturotol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/B9wesDdUo4k/wb?keyword=coach%20quotes%20soccerPDF link annotation
    • 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_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 4884 bytes
SHA-256: 6e31fa0e6d210e804630be711a1bc570ed04d1b1305951bce30ca281ea9c9ac5
font_01_sfnt_off0000f452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF452 10852 bytes
SHA-256: fe4a86f134e64d14ef2aefbb9c95240f83974be8fdc9a98f93d5c3a7c95ccbac

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