Malicious PDF — malware analysis report

Static analysis result for SHA-256 165d70bacc8a3394…

MALICIOUS

PDF

74.0 KB Created: 2021-05-15 15:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: e6bb7ad8d557c850a2cb3edc77ea80cf SHA-1: b0421f44e6341108bfcaa5f26d958d957373302a SHA-256: 165d70bacc8a3394b428eb492ab5f0a251fb1e178d70eb768e4b1f0063f8ad6d
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the presence of numerous embedded URLs, including suspicious ones like http://bachanalytics.com/271495580891y6xj.pdf, suggest it's designed to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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 http://bachanalytics.com/271495580891y6xj.pdf In PDF document text
    • http://merovew.xyz/modern_handwritten_calligraphy_font_generatorcskbi.pdfIn PDF document text
    • http://mailedflkf.site/553602849606nkxs.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/pokavanuz_gonajadepawoso.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/suxugozagideniw-zemozugob.pdfIn PDF document text
    • http://item-mask.top/types_of_influence_tactics_with_examples75mta.pdfIn PDF document text
    • https://vosuwuzede.weebly.com/uploads/1/3/4/7/134743003/fewoneteruwopemosel.pdfIn PDF document text
    • http://fredo.bike/sisojojvfmax.pdfIn PDF document text
    • https://mizilugodipibo.weebly.com/uploads/1/3/0/8/130813887/zojatikanowenulewen.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/3133575.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=what%20is%20a%20draw%20tite%20activatorPDF link annotation
    • https://s3.amazonaws.com/zaxawetawupo/stihl_trimmer_prices_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/bazaraa_linear_programming_and_network_flows_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce16907-dcb7-4f63-b999-8198c8e35f44/what_is_the_difference_between_modern_and_traditional_societies.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/daily_oral_language_3rd_grade_common_core.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d93db76-0161-4abe-8214-4ad13d8d9a4f/sakagopimidebira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde46ad1-c9ec-41e6-9cd8-f8ef56ae6aa5/23861378293.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/sales_director_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/hayward_chlorinator_original_o-ring_clx200k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2850f2b4-2861-497f-aa63-0faac98f4605/fiwasudulazalopafuf.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/andrew_foster_deaf.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_off0000d8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AD 4840 bytes
SHA-256: 2836def3c0e1c1031f72a4429fa335e66a568ecae222131cc72e21a5ca8c86e1
font_01_sfnt_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 10496 bytes
SHA-256: d13f97444170176b227533a67064e1fd686b22562ad27297c70239b46ee3fb2b
font_02_sfnt_off00010d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D06 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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