Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7256be32459229d…

MALICIOUS

PDF

110.1 KB Created: 2021-03-16 20:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ca2643b93b2e552c6ab1be1c447db14 SHA-1: 1b96fce929eeda12196966583bfd5c0e437ca777 SHA-256: a7256be32459229d1cff69f70e912572fb0b0db45bd1936d9cbc4b9e50ba91db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'Fallout new vegas powder charge schematics' to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://ponafet.ru/strik?utm_term=fallout+new+vegas+powder+charge+schematics
    • http://a1metromovers.com/arcana_evolved_3.5me3qk.pdf
    • https://cdn-cms.f-static.net/uploads/4390642/normal_601925c9b9d06.pdf
    • http://trikotoria.ru/wendys_menu_frosty_ingredients5ne31.pdf
    • http://vixojejuzata.iblogger.org/tizedabuse.pdf
    • http://cardio-natural.info/26982219337od9kq.pdf
    • https://static.s123-cdn-static.com/uploads/4379974/normal_5feee29c08e41.pdf
    • http://mignonette.space/budget_2019-_20_pakistanjgi9a.pdf
    • https://nijolonarezop.weebly.com/uploads/1/3/3/9/133999518/716423.pdf
    • https://static.s123-cdn-static.com/uploads/4450356/normal_6001a690680fd.pdf
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/rokonasetimunubudov.pdf
    • http://prizinsta365.website/crepusculo_filme_completo_dublado_paju1ah.pdf
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fc56c8e36364.pdf
    • https://xinulirolome.weebly.com/uploads/1/3/4/5/134599248/9330899.pdf
    • https://cdn-cms.f-static.net/uploads/4403683/normal_60263ba89e133.pdf
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/1413627.pdf
    • http://wozufilugud.iblogger.org/chevrolet_captiva_2020_manual.pdf
    • http://xifizajutebov.22web.org/pemopiwododo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejelevimira.epizy.com/vukuwapukedubegepin.pdf
    • http://zoketuru.epizy.com/caffeine_and_anxiety.pdf
    • http://nurarodavokowe.epizy.com/principles_of_ecotourism_planning.pdf
    • http://jopewadakos.epizy.com/wuvix.pdf
    • http://mosepurone.epizy.com/stained_glass_slope_graphing_linear_equations_slope_intercept_form.pdf
    • http://jijojigig.epizy.com/giwot.pdf
    • http://zojimako.rf.gd/bruce_lee_2_movies_in_tamil.pdf
    • http://todosix.epizy.com/can_you_wifi_call_on_android.pdf
    • http://lebidaxelu.epizy.com/creeper_platform_shoes_womens.pdf
    • http://zirisonuwup.rf.gd/mapa_mundo_fisico_mudo.pdf
    • http://ratazudawi.epizy.com/noun_adjective_and_adverb_phrases.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000155e2.bin
2fa43fa60603aed69596a70dd733302fc2d167b2ae5b0bbe2ced17b929d2cf52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155E2 5596 bytes
font_01_sfnt_off000168dc.bin
d31d865c194be953d0205583abc389b929d249180bc1ebe7342f0f123d72546e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x168DC 13492 bytes
font_02_sfnt_off000194a3.bin
159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194A3 16140 bytes

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