Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9ec031d975e363…

MALICIOUS

PDF

80.8 KB Created: 2021-03-16 03:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4cd277d8846762767e31755190977f89 SHA-1: be921f9175a1bd93cb9f2bef1578c7f9b6b57034 SHA-256: 0a9ec031d975e36300462eb0654dcf5e7dc22e71036263e204c415b5ed2fef0d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=questions+for+food+inc+answers'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=questions+for+food+inc+answers In PDF document text
    • http://sevagawos.getenjoyment.net/20525004037.pdfIn PDF document text
    • http://siwupezomejen.getenjoyment.net/2899055137.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379489/normal_5ff23053889d9.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/6.0_powerstroke_intake_torque_specs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_600d9c1ae014c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374199/normal_5fcd00accf590.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5fecef630ee02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pejinubonuxus.epizy.com/medodosoto.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/german_address_format_apartment_number.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/munopibitub.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/6th_grade_math_book_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/55882362270.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/fha_guidelines_for_mobile_home_loans.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/woxujafowa.pdfIn PDF document text
    • http://febuner.epizy.com/secret_life_of_pets_2_characters_voices.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/podafugazaxevosexuj.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/dinamap_v100_operator_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/beginners_guide_to_wine_making.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/gujuferemukulawulufule.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17E 5020 bytes
SHA-256: d261366fb0c108a30e5e197dcf901b5c720ca057adcd62e3bd9c4dc8d2c1fe03
font_01_sfnt_off000102a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 10436 bytes
SHA-256: 62c0157378bd2fa43166ff5e85c210d25a3595821534fbab56a5b2050382ff14
font_02_sfnt_off00012659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12659 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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