Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde00d34429e90f1…

MALICIOUS

PDF

75.4 KB Created: 2021-02-25 16:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e67ef74754594263b10cb25e905877b9 SHA-1: fae8324e16138241889ce5be965a7496b722626e SHA-256: cde00d34429e90f1506a2b06a39f812a0f80deb550146447e2ab5924c48be5d7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically appearing as a search result for a technical query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of many external URIs and a link farm heuristic further supports this, suggesting the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://jottigo.ru/award?keyword=can+you+cut+stainless+steel+with+a+plasma+cutter PDF link annotation
    • https://xupijologa.weebly.com/uploads/1/3/5/3/135327862/0932530.pdfIn PDF document text
    • http://kidepokapila.22web.org/beethoven_sonata_10_sheet_music.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/volijuwo_kalekug.pdfIn PDF document text
    • http://medakijizu.22web.org/grid-_template_columns_repeat.pdfIn PDF document text
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/05944c.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/1963469.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/19327693282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_60117caf5f7fe.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/everyones_an_author_2nd_edition_table_of_contents.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/just-in-time_systems_are_considered_part_of_which_primary_activity_in_the_value_chain.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5fd7dfa9ccf77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485004/normal_5fd6ad82dbf2e.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/fesub_dazatebik_texujadopepi_bixugolinidid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5fd9298e3c1aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudatuvabejosix.epizy.com/neporofupipadivelaga.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/wegeriliraw.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/l298_datasheet.pdfIn PDF document text
    • http://rafoputoxuxu.epizy.com/12386500728.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/kenajabimenebibabetofofe.pdfIn PDF document text
    • http://lesasesodimavun.epizy.com/94797892269.pdfIn PDF document text
    • http://livixutufedesuv.epizy.com/baroque_prelude_piano_sheet_music.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/sutuguzog.pdfIn PDF document text
    • http://karatufi.epizy.com/buck_owens_discography.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/97667368266.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_off0000e9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 5272 bytes
SHA-256: b372834dd1ea8db61d7b219bf15394abc1d3e7e833bda11337415dcce8fb6531
font_01_sfnt_off0000fb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 10412 bytes
SHA-256: ea0797a9ff0d54a3433ff470d7de066f31c07a4c97482e07c7b6f054fe457269

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