Malicious PDF — malware analysis report

Static analysis result for SHA-256 513ebcf4592dea4b…

MALICIOUS

PDF

73.8 KB Created: 2021-03-16 07:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9af34abb32e05533242ba3034128c2af SHA-1: 481d0b40734d81a48ab0d276ec616b0ad963ea4e SHA-256: 513ebcf4592dea4b7cc204f85f94820eca3c70101682d9e199daecc83d7d8c83
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links pointing to disposable domains, a technique often used for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://gimoguvi.ru/wix?keyword=peter+pan+and+captain+hook+fight+scene+part+1 PDF link annotation
    • http://momarivido.mypressonline.com/74019556987.pdfIn PDF document text
    • http://kuviruvada.getenjoyment.net/brillouin_spectroscopy.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/ibMRUYA/cracked_screen_prank_iphone_7.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/OQVshdJ/battle_angel_alita_last_order_omnibus_1.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/66443897593.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/8vTdXy5/zetaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_5fd9c18b4a58b.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/enYLjjg/85027795222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fe87d1f44778.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/ffx_2_hd_100_percent_guide.pdfIn PDF document text
    • http://xagixowedobosab.medianewsonline.com/what_is_the_meaning_of_apostolic_succession.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/ggeig2c/guide_rock_nebraska_map.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/jfjeywD/21829108580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_60174949215fd.pdfIn PDF document text
    • http://garobunatuxovi.scienceontheweb.net/sharepoint_2016_tutorial_for_beginners_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/flihhb8/neha_kakkar_songs_2020_new.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/jugeNgd/among_us_ejected_screen_gif_maker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desejole.myartsonline.com/61295946807.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_e882e251f2bd4f1dae58c3c6d5d5fff4.pdf?index=trueIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_d709723e3a574a76bdc0ad566de4029c.pdf?index=trueIn PDF document text
    • http://vunonam.atwebpages.com/78089324314.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_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 5500 bytes
SHA-256: 4e4c561e1656ca677443c456b4544079484e1c102c1d34335c37853d70665687
font_01_sfnt_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 10788 bytes
SHA-256: e78a641cd7c717b20b89470b44054d8f69a93cc4ce4b41a0f61dbca225bed157

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