Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6941e7aaff5f8b6…

MALICIOUS

PDF

68.2 KB Created: 2021-02-06 08:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a8a5164194e5be4717e221e6322ca745 SHA-1: 773f970564aaaefb0b2f637e331106b3212f4b96 SHA-256: e6941e7aaff5f8b62b4171c8fff68e3ec425e135e53046fd57d84ab2379e1037
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://baarspo.ru/aws?utm_term=beretta+92+compact+guide+rod PDF link annotation
    • https://cdn.sqhk.co/xojelumegasi/egciihf/94754645247.pdfIn PDF document text
    • https://zedowegekinusil.weebly.com/uploads/1/3/3/9/133997302/litunilutit.pdfIn PDF document text
    • https://jowopuvuramikir.weebly.com/uploads/1/3/5/3/135313070/6cf0efea23f.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/writing_complex_sql_queries_examplesobkiu.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/ShfLYDt/41273681073.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/a15a25a041a.pdfIn PDF document text
    • http://white-x.fun/rekamosuviwegosa5i4y.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/399281430042nl47.pdfIn PDF document text
    • https://cdn.sqhk.co/riwutosax/IcidjcR/accredited_homeschooling_programs_in_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/t5g7aih/85628351221.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/dHiZaji/24453195905.pdfIn PDF document text
    • http://heleogose.online/kitenokatulexidubokamapo5327.pdfIn PDF document text
    • https://zepazilarewar.weebly.com/uploads/1/3/4/3/134310653/xulip-vumilazovi-nuxuzipuzedo-gabovigatutex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kegubinefuda/datugajorefemoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/short_fables_with_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/neet_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/1677599773.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/free_test_bubble_sheet_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/9931435673.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_off0000bd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9B 5296 bytes
SHA-256: 3c75003b0ec84cea4d0b36901707cc65678318ef15b835cd20b8ff0def468889
font_01_sfnt_off0000cfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA1 10624 bytes
SHA-256: 874ba2114a2c8ef03e8f60407f924299d4bfec9468d0bb7d4ffc0f6e7d01d49b
font_02_sfnt_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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