Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b0f4bd678e867c…

MALICIOUS

PDF

80.2 KB Created: 2021-03-17 17:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f18cbe3747a9d9ea4f4b80dbd0cc9994 SHA-1: 59ca69c14f7d586acf45c8e4909cb13790cc00b3 SHA-256: 15b0f4bd678e867c92a915034a542c97e6fa1ffb919d9ad2311ee5b9c617cd12
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/award?keyword=glencoe+mathematics+algebra+2+pdf'. This indicates the document's primary purpose is to direct users to a potentially harmful external site. The ML classifier and ClamAV detection further support the malicious nature of this PDF. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=glencoe+mathematics+algebra+2+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_60474d1bac896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_603ce23e29f19.pdfIn PDF document text
    • https://cdn.sqhk.co/letabuner/hggeVia/sky_sports_red_button_games_on_now_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_5ff8abe41acc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5ff0c7f25b7ed.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/hdhdFbt/good_slice_level_30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466689/normal_60520fc22c856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5fc7bc6badd18.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisofokox/cjc9Sk1/80658263407.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/pOWjgo2/she_wants_me_dead_nightcore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_6024a71f6d6d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_6007306c47ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_6019c7231b358.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/zowejunef/bose_quietcomfort_25_android_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/31872388805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9118822-5d7a-408e-af0c-a97c66e8e738/quem_no_sabe_para_onde_vai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ffb1b0-9739-46d5-b37c-fd07e8e0f9c9/86912732533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9d29aa-11f9-43d7-adaa-c0cceddbac5a/jam_wireless_bluetooth_speaker_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a4ea72-cc0f-4b16-ab3b-067f312b15cd/iain_banks_complicity_review.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/tufenidarinewobimevuxekuk.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/mhw_decoration_farm_guide.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_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 5872 bytes
SHA-256: ba66772c04012563eb77af875d3ddbab2ff24f9a94de6c9dd979b229451b88dd
font_01_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 10944 bytes
SHA-256: d83037d849abeec32cbd759d3ea52bfc2d46a9bb06763a7cb50c5ae5789f40d2

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