Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b2f432b2865377…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 10:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc73a4bddcc02f1b5a5e7aba82b11e20 SHA-1: 3758b5e771281c259967fc937c94124aaf436078 SHA-256: a6b2f432b2865377946bc9a86cff59f39d06273483824e959e5d2b990503d0f8
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/wix?keyword=noah+webster+schools+az PDF link annotation
    • http://investmag.org/how_many_cc_is_5hpdufgq.pdfIn PDF document text
    • http://meetdouche.xyz/todipaysk1.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/abbots_leigh_hymn_tune.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5ff6104e6f9ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_601f24611f71e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_602de84112434.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/digidesign_avid_control_24_control_surface.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5ff3e9f4406fa.pdfIn PDF document text
    • http://mysteps.online/lofiwemapf8510.pdfIn PDF document text
    • http://banquepopulaire-fr.org/mujajoxuzubeecrns.pdfIn PDF document text
    • http://samozanyat.info/grade_5_creative_writing_examples1vstc.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/3481401525.pdfIn PDF document text
    • http://robinmani.site/22535331528jveis.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/kawaii_anime_girl_wallpaper_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzariwa.rf.gd/sidazevukimimoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e113559a-d336-4697-a597-64bf29b33474/sda_church_close_to_me.pdfIn PDF document text
    • http://ragujaje.rf.gd/derivadas_trigonometricas_ejercicios_resueltos_paso_a_paso.pdfIn PDF document text
    • http://gixuwopafapiro.rf.gd/master_cleanse_stanley_burroughs_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2150192-70f2-4afd-a498-3c8f8c06353a/69573572935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daac5e48-663e-4952-aba6-fa560531f3d4/what_does_it_mean_when_your_heater_says_e1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9ec138-f8a9-4668-ada8-2fe88b17656e/13860560594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a50b3e-c822-4614-8998-edebc1062ace/kayla_itsines_free_download_vegetarian.pdfIn PDF document text
    • http://pomixaso.epizy.com/apache_poi_for_windows.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_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 5136 bytes
SHA-256: 78921304c8b75d83a26ddc549a5bf5e3515b14daf28b7dc34dae46522bf4a662
font_01_sfnt_off0000ffdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDD 11284 bytes
SHA-256: e492a1db86f46d3c8af582809f64b5946b3c524a39a15a0291c3c4a20b0fe653

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