Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e08a03e030fc239…

MALICIOUS

PDF

68.6 KB Created: 2021-03-21 00:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e8d67035ce8c7318dc77ffa955a68761 SHA-1: 41cc742e6ad2d5c09bc5398ee90fe90cf46112c6 SHA-256: 8e08a03e030fc2398f1c00d2d3a7982112ab2c94fa4e08347d65b1ed6a88be75
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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://golowaki.ru/wix?keyword=mse+reflex+sight+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386095/normal_6026ee79a3462.pdfIn PDF document text
    • http://digovin.getenjoyment.net/chrysler_town_and_country_flexplate_replacement_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_60277b614ba73.pdfIn PDF document text
    • http://didazema.mypressonline.com/67318759766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_602dc7f64515c.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/2b478d2d-16f2-498a-9f2c-0a50d721cda5/leperoxozavonarokik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93076137-f318-41c4-b027-19fda78b4773/how_to_get_sound_from_epson_projector_to_speakers.pdfIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_57ff1b7f349549d39ab1fa4e1be36bbe.pdf?index=trueIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_62169147c65941f78920bbb9fcc999ae.pdf?index=trueIn PDF document text
    • https://e2a3f85e-3ce8-4c76-99a2-e63219cad5ad.filesusr.com/ugd/473d25_f231f592e05949928ef521a10bf9c371.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_84662f112e564b6cb9563d63711f324b.pdf?index=trueIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_3e151b48180a4da8b16d0c4781bb1178.pdf?index=trueIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_05208f1312074f51a49f8e648780b061.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_999223f787c84aa8beeb4569d209a94b.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_a0b729f39eda4452bf9792eb62d2b739.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ef6cfa-f15d-454a-97b4-24c1626e5933/deer_hunter_2014_game_online_free_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0ad415-22c0-4bbb-8691-47f0314bef0e/dakekafiki.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_86fb55af4997469a93e252ef619d51bc.pdf?index=trueIn PDF document text
    • http://ligeziwofumupo.epizy.com/ms_excel_full_course_in_hindi.pdfIn PDF document text
    • http://putedugiganipa.rf.gd/research_topics_in_agricultural_economics.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_off0000d1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DE 5140 bytes
SHA-256: cac610446889a0ab6eaa660c2245e282c03858bd3e44e0c88a02871b4d7c945e
font_01_sfnt_off0000e371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 10060 bytes
SHA-256: 1a49f96203abe029bff0a1a44a9ca176e51288e455b9024f08c1a167e413fd69