Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a42ae2911da25f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-16 17:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3174865cdaf6d2f9d0c09ca411030581 SHA-1: bcee231c868d0a63f75deb41005005deae39e2c1 SHA-256: f0a42ae2911da25f27965a90e1f37d6ec89b23fb4845025389d24dfa9ed62562
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are designed to redirect users to external sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=frozen+2+drive+mp4 PDF link annotation
    • https://cdn.sqhk.co/fegadosijete/ighetha/laxibifixugozisabekadik.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/39968231869.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415308/normal_5fc90b8a291cb.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/thbhaja/scary_deep_sea_creatures_videos.pdfIn PDF document text
    • http://dewobazul.22web.org/intent_to_vacate_letter_word_template.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/5872841.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/42287577579.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/6952170.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_to_write_an_assessment_example.pdfIn PDF document text
    • https://borugurobe.weebly.com/uploads/1/3/4/5/134582704/6182521.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/2d76271454772d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_601c686dcede9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vogidefoxafubis.epizy.com/sheet_street_towel_rack.pdfIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_c1b7e861ea3b4d4a87c7d7677831d517.pdf?index=trueIn PDF document text
    • http://vumesurev.epizy.com/mathemagic_shadow_book_2_answers.pdfIn PDF document text
    • http://revobisamapekuz.epizy.com/bloons_td_battles_hack_pc_free.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_26d9608564d54c739dd34eba9e326892.pdf?index=trueIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_0e2cfc36edb84e4dab3952d3131dea5d.pdf?index=trueIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_ab0fb29a63a0435d927a0afeb32ff139.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_962e93afc4fd4411a859594262cd90d5.pdf?index=trueIn PDF document text
    • http://sidepojedava.myartsonline.com/pride_and_prejudice_volume_3_chapter_9_summary.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 4972 bytes
SHA-256: 547bd64233ac5660abce1fe840cbbfdc43adc29621c02a818daa45e2da545968
font_01_sfnt_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 2240 bytes
SHA-256: a94fc0b04a3ff4da30cea24b3fb8f2fee2c1ab2008078f8bc2ee051ee710afb4
font_02_sfnt_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 12140 bytes
SHA-256: f0aa3834a6fac9f21382d79cd3019fb19c0dff4211231eef35b8700b8fdf86da
font_03_sfnt_off000120a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A9 16804 bytes
SHA-256: bff25a56e22bd51f8feef68a31794bfa1b9594ca26df2a956f7116fa76d44bf5

Open this report in the interactive analyzer, or submit your own file for analysis.