Malicious PDF — malware analysis report

Static analysis result for SHA-256 1144f7e09374c6c0…

MALICIOUS

PDF

74.9 KB Created: 2021-01-22 12:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dff72b042a64cd6fc79fb72b3d2e9981 SHA-1: ea55cf51f86e11b49a090c2a3d1ad388ebde6f83 SHA-256: 1144f7e09374c6c09d058f8c0be4ab1dbdc07a6bdbd40b2c9473ff1f0a587ff1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests a phishing attempt related to financial transactions. The embedded URL points to a domain associated with a lure for 'wells fargo east grand forks', reinforcing the phishing theme. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it exploits PDF vulnerabilities to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jacksth.ru/123?utm_term=wells+fargo+east+grand+forks PDF link annotation
    • https://site-1168143.mozfiles.com/files/1168143/27154116074.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/c8if9ua/lomomojibuliposapovid.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/RUSjwCD/shoot_em_up_movie_download.pdfIn PDF document text
    • https://site-1261141.mozfiles.com/files/1261141/chichen_itza_tourist_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/ihidhfX/highway_rider_extreme_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/hjOkjbe/siberia_movie_box_office.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/Nhihee5/senumafabebojusifexeladun.pdfIn PDF document text
    • https://cdn.sqhk.co/jujegopenop/hh36jim/potevorud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fdc5400382bf.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/gdheujd/hoop_stack_level_350.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/en5thhZ/79050367100.pdfIn PDF document text
    • https://site-1177754.mozfiles.com/files/1177754/horrible_harry_and_the_dragon_war_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/xapewiwud/yib4iix/11810389530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ff4dda38620e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fd7f1931a48d.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/jifesu/new_whatsapp_status_2019_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/ark_aberration_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/zinubeburano.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/bohol_tourist_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/24177130015.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/movie_website_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/72879874772.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_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 5152 bytes
SHA-256: 79f3840d45d910d2aca3c99be9898e2b484b352ef07d91f36d133d4590f20ea7
font_01_sfnt_off0000fad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 10364 bytes
SHA-256: 08efda4723968caf7cb59d1dc0dc4b2d013111d6761946c198e93743f6709bba

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