Malicious PDF — malware analysis report

Static analysis result for SHA-256 897de5c365476474…

MALICIOUS

PDF

95.8 KB Created: 2021-04-18 07:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a0e536523fb67f35905cd7b0fb16e5 SHA-1: d60e3cd9c4bb44702b426946680e6bd12537dd66 SHA-256: 897de5c365476474283c0e421880d5fb4ca995b7abfd32c5c892c6fc6965d929
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'dafemum.ru' and disguised as a search result for 'washington dc population growth projections'. This heuristic, combined with ML and ClamAV detections, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent to redirect the user to a potentially harmful site.

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://dafemum.ru/strik?utm_term=washington+dc+population+growth+projections
    • http://vusuwejilukuxe.iblogger.org/famewixegojorexi.pdf
    • http://pakirekugep.scienceontheweb.net/definicion_de_factores_bioticos_y_abioticos.pdf
    • https://static.s123-cdn-static.com/uploads/4458635/normal_5fe0c602c14f9.pdf
    • http://sumidabitax.iblogger.org/feliz_navidad_baritone_ukulele_chords.pdf
    • http://zuregazezoral.mygamesonline.org/28389070713.pdf
    • https://cdn-cms.f-static.net/uploads/4375207/normal_600cb8e995100.pdf
    • http://tiwelonepozafuw.iblogger.org/86268804633.pdf
    • https://cdn-cms.f-static.net/uploads/4385634/normal_606de2d3c2eba.pdf
    • https://cdn-cms.f-static.net/uploads/4452400/normal_6039586fdda09.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bejideba/primary_frca_in_a_box.pdf
    • https://uploads.strikinglycdn.com/files/a50abb7c-42c6-496f-a55b-c207e80b1e7e/what_is_interesting_about_intellectual_property_law.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/hp_laserjet_p3015_manual_feed_problem.pdf
    • https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_d3f4171d103b4a32840449c65287b774.pdf?index=true
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_6d1b882c583447e6bf79b94234b7b27d.pdf?index=true
    • https://s3.amazonaws.com/divexikav/wondershare_mirrorgo_premium_apk.pdf
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_b71461806fa0499ba05587792bacc2a1.pdf?index=true
    • http://dofemuxu.rf.gd/cheap_thrills_movie_480p.pdf
    • http://peruroz.onlinewebshop.net/toutes_les_analyses_mdicales.pdf
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_28b77a03d7204d88b51f56728f78f331.pdf?index=true
    • http://sekekubonigav.rf.gd/doviwu.pdf
    • https://uploads.strikinglycdn.com/files/999254d4-2266-470b-a87b-34d47fde838f/wagner_wallpaper_steamer_parts.pdf
    • https://s3.amazonaws.com/netinuwa/what_occurs_at_the_cathode_of_a_galvanic_cell_made_with_magnesium_and_gold.pdf
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_eaaab7a45b08494a9aa70326581b7abc.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013870.bin
862db20492d097dbf6e56d73cb70f99b316d3223cab9678984ce758ab33a7f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13870 5516 bytes
font_01_sfnt_off00014b4d.bin
f1fd621d7157cc725e35296774e70e4a4a1c3da6f98f8691eec633e30c91815f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B4D 11292 bytes

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