Malicious PDF — malware analysis report

Static analysis result for SHA-256 4012bf6846e85a39…

MALICIOUS

PDF

66.7 KB Created: 2020-11-30 21:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 25d420289e39bc7113038d293b1701bf SHA-1: 8b13923ea943c93c7112680393039656e26540ac SHA-256: 4012bf6846e85a39f002ce76aa40aca552968fe1d9d433ddaba3f627e74cc757
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its structure, which contains a large number of embedded links. One of these links, 'https://ggtraff.ru/strik?utm_term=federalist+paper+51+worksheet+answers', is known to redirect to malicious infrastructure. The presence of numerous links suggests an attempt to distribute malware or phish users by directing them to potentially harmful websites. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=federalist+paper+51+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5fa06136ce0b6.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xujewonagamaxu.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/bamuralizoxaxetexe.pdfIn PDF document text
    • https://rawavofim.weebly.com/uploads/1/3/1/4/131452817/8660767.pdfIn PDF document text
    • https://tuwozuzoleza.weebly.com/uploads/1/3/4/5/134509843/tugamikolesegavik.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/0100d579-64cf-4a4e-bb6e-75f4b6b9cfc6/10310499918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28bfa4b3-71af-41e1-8f09-86492c846354/wow_wotlk_holy_paladin_pvp_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698d97f7-8c37-47b7-8908-fa24be8a8139/also_sprach_zarathustra_kostenlos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1656ae2-b7cf-4891-a976-d9aab0e87fdf/permutations_and_combinations_proble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af499afb-ae11-4bfa-a44c-a51940e48de7/nekozaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f796c0e-7dea-4d4a-a422-d06419a36f1c/vasivabosaratumakekafoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095bdd00-00b2-4561-beae-a2b88de65e9b/best_buy_bluetooth_adapter_for_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2dc1004-fcc7-4c08-9f38-3b0fc8d99014/776_area_code_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8e67ab-adc0-4987-87c1-dfa1de833650/salman_khan_bodybuilder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451c182d-b525-4f0e-9d13-90af0df29a8c/torrentsnack_password_red_dead_redemption.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02e121f-03a0-41bb-93a4-44cd4a6e3d27/personality_test_animal_lion_beaver_otter.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_off0000cc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC30 5332 bytes
SHA-256: ccd20c59ccd5f1e794763443175074532b90463e0837557d4c98222b1a018d83
font_01_sfnt_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 9220 bytes
SHA-256: 4eaa4c243602cbb9fe34234200bcfba943e6ab46c65b07ee18b1155e41c35ac1

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