Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd65e122551a475…

MALICIOUS

PDF

76.3 KB Created: 2021-03-30 09:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 532f03916acd3860d146d994c4216f94 SHA-1: 12230e0fdbd57c8cee6e2dd8cc4ff7335da1e5e3 SHA-256: 1cd65e122551a4755bd31e6068a91fae8d8a62bfa9716a9c5d450b27f11d462c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://fokemale.ru/strik?utm_term=has+empire+season+6+ended PDF link annotation
    • http://faxusupovetek.sportsontheweb.net/haier_split_air_conditioner_filter_cleaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcf4c015979f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_605008ef29f67.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/73826875509.pdfIn PDF document text
    • http://vavisavig.22web.org/54845551900.pdfIn PDF document text
    • http://nodefiw.medianewsonline.com/taxonomic_categories.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/cellink_battery_b_manual.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/funesolunulimesaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476302/normal_5fcacb011a248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimozovo.epizy.com/cathodic_protection_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c0c66e-ccd6-46a9-a11c-5285dadd4074/jatepuvuk.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/unknown_number_block_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/assistente_aggiornamento_windows_10_1903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8fe241-fc3c-4765-8cff-0332797751ba/class_5_maths_book_in_english.pdfIn PDF document text
    • http://xoxudexutuku.rf.gd/concierto_aranjuez_ukulele.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/bhairava_dweepam_songs_free_naa_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d9f440-653a-402a-911a-fb829548fed7/tabela_de_frequncia_estatstica_exerccios_resolvidos.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/vepewotiwaduju.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/calineczka_ksika.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/adobe_reader_dc_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb24c74c-4931-4021-9142-dc9524028b06/diono_radian_5_reviews.pdfIn PDF document text
    • http://damowepoko.myartsonline.com/58836724719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e42c8d-0a19-4e73-9740-93333e08fa56/how_to_replace_battery_in_firex_smoke_alarm.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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5188 bytes
SHA-256: c8b72d0178b883760b0a37fcb9a638bd3224bb2e126c63e3e7acfbb4c01c0308
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 11136 bytes
SHA-256: c63abcb08abb595f2406a190aa7f69dae92a4751cd2b4c3bca98c738cd7fb3eb

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