Malicious PDF — malware analysis report

Static analysis result for SHA-256 73784a1f5811ba85…

MALICIOUS

PDF

77.1 KB Created: 2021-03-11 07:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 35bd02d506f196fd8954a2deaa6daf7d SHA-1: ca01c64012fd1298eef716e5c099b07125b08f06 SHA-256: 73784a1f5811ba851444da9c00c6d79bf1c4dbb5035717cacacc5f0fc6405425
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the ClamAV detection (Pdf.Phishing.Trojan) strongly suggest a phishing or trojan delivery mechanism, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=the+shining+book+or+movie+reddit PDF link annotation
    • http://zaxevef.getenjoyment.net/lomogidumizegabokapiriv.pdfIn PDF document text
    • http://funogager.22web.org/authorized_distributor_letter.pdfIn PDF document text
    • http://stopro.store/creative_pci_express_sound_blaster_x-fi_titanium_fatal1ty_pro3fu40.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/2020_catholic_daily_bible_reading_guide5hcx3.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/ZdFVhf4/45204635737.pdfIn PDF document text
    • http://teleporttur.ru/loseselerekugemida0sxwf.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/vans_old_skool_suede_blue_fog.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/chjhjhb/mezorimoforasolakelew.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/gcERdw9/penajejowa.pdfIn PDF document text
    • http://fresh-ita.fun/37179940108cal99.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/toxogibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nisoxow/venaxudoza.pdfIn PDF document text
    • http://ripapekum.epizy.com/catecismo_de_heidelberg.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/how_to_move_mount_fuji.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/lg_bluetooth_headphones_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/what_is_a_risk_assessment_in_childcare.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/ut_san_diego_chargers_report_card.pdfIn PDF document text
    • http://xolevusafo.myartsonline.com/65546083868.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/fixupemanemuwisod.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/6.0_powerstroke_rebuild_kit.pdfIn PDF document text
    • http://noratev.myartsonline.com/what_is_30_30_vision_mean.pdfIn PDF document text
    • http://tiwadelir.rf.gd/all_american_925_pressure_canner_for_sale.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/how_do_you_factory_reset_kindle_fire_when_it_wont_turn_on.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_off0000f2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 5208 bytes
SHA-256: 827c598c0be7d7a2b02debd69f670e75acd0c67661ff9e95e94125b50290b801
font_01_sfnt_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 10376 bytes
SHA-256: 0580a50480309aa5e6b864746b8155ff3b623521d00f273618e256fbfc967bfa

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