Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabc1fc490adf6cc…

MALICIOUS

PDF

73.2 KB Created: 2021-03-17 09:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 448c971312a43742618391ad928590b4 SHA-1: dec803d6026475e3ab24a699304e20133edd795b SHA-256: eabc1fc490adf6cc1c5051f88a547c76c91561ab5122bbd8f5db989962e34505
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The PDF structure and embedded URIs indicate an attempt to redirect users to external malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=bacteriologia+general+evelyn+rodriguez+cavallini+pdf PDF link annotation
    • https://jafumatelitu.weebly.com/uploads/1/3/4/8/134884178/8601070.pdfIn PDF document text
    • https://wigawiwamenusum.weebly.com/uploads/1/3/5/3/135323889/fipesofam-wokixonewiga-vosuwatipafax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408987/normal_5ff007f0774bc.pdfIn PDF document text
    • http://straponartist.com/are_you_with_me_country_song_lyricsumsf3.pdfIn PDF document text
    • http://retys.fun/post_office_saturday_hours_raleigh_ncikvl5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fc74b90da3f9.pdfIn PDF document text
    • http://spainwow.pro/bmw_navigator_vi_review0lbsi.pdfIn PDF document text
    • http://strita.space/rogifatagepuniles6rgh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_6037829ac4554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5fe7bc04924be.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/aniseikonia_adalah.pdfIn PDF document text
    • http://gta-msk.ru/batre_notebook_acer_aspire_one_722gi8zz.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/pivigibavrshz.pdfIn PDF document text
    • https://bupekotarox.weebly.com/uploads/1/3/0/7/130739944/29c4d068.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/906c487e45.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/wedexelovusobupapavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabotojixupi.atwebpages.com/the_ghost_of_canterville_summary.pdfIn PDF document text
    • http://xutulatovemi.epizy.com/fajobugovumir.pdfIn PDF document text
    • http://banamuf.rf.gd/barate_movie_songs.pdfIn PDF document text
    • http://divimoxigorube.epizy.com/38722932199.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_off0000dc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC50 5404 bytes
SHA-256: 9d9552c2e1b80bae50c0f38d869637d89d2ed069adf577fc92a62368f2656620
font_01_sfnt_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 11892 bytes
SHA-256: d04a835ee51b8fc5bc7c93370bd6574ec49e039f23f43f46d2594a47867bba8a

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