Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd1ce0b945ad70a…

MALICIOUS

PDF

83.4 KB Created: 2021-05-27 18:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5f01bf4ef809399360eb25ef8c0bfe4e SHA-1: 24bf4a09f9370d57bfb22b7541387a419d2ccd50 SHA-256: acd1ce0b945ad70a225b8040105ec47b743a4e867f00ee0a883d8041154cd959
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, suggesting a link farm or redirection scheme. The primary URL identified is 'https://fokemale.ru/strik', which is likely used to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://fokemale.ru/strik?utm_term=how+to+change+head+on+vivitar+facial+brush PDF link annotation
    • https://minileponefij.weebly.com/uploads/1/3/1/0/131070526/jimum-pugelerut.pdfIn PDF document text
    • https://xinuluparos.weebly.com/uploads/1/3/0/9/130969110/dotaru-mizumufa-ratebujod-semeginuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_601ee4e91c0d9.pdfIn PDF document text
    • https://zegexexu.weebly.com/uploads/1/3/4/3/134385137/torure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_604310b468a77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453906/normal_5fe292894663b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372982/normal_5ffd7c6cea934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_60015ba6e1f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_600e70ad6ce7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_60287a6967a54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483083/normal_5fcb1c5a3dde5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60519c6ce42ce.pdfIn PDF document text
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/lonazidujobekexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_606b79a2694c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_606a55a7170f8.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/71363184-0dce-4c77-bcad-e5c75a47622a/critical_thinking_definition_ap_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c55011-0dee-4a56-ade5-4766ac44a318/neretuzawipog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee442f9-b807-4627-8efc-8a5a76298dd4/jarewujazividevoribereva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b373ae-5dec-4946-96eb-d24c4e3b40ab/vopolebaniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e6c17c-475c-4b00-b701-3c39e1550020/new_york_new_york_drum_sheet_music_trumpet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68500a53-d505-45fa-98b3-030f6ebf5f42/jedukegoraxatetexudot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e1b4c4-c07b-4367-9a1f-d9f3a4037f39/bonaire_evaporative_cooling_no_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad2555b-f318-42a8-801b-c5a39faf01d7/whats_the_average_number_of_lovers_for_a_woman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713fc44d-6164-4409-868b-d9ab5028e110/dabimutilopusati.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 5536 bytes
SHA-256: 513773738da204cfd9ace419ea02c9b0f0ca854ad29d3b728ef36eb3e78e13e3
font_01_sfnt_off0001075b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 10572 bytes
SHA-256: a8d5b67f883d0a438c0c55728f668af31e3b42fe1018405059ab65b9acf5060c
font_02_sfnt_off00012b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B66 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd