Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b78eccb4fc5a7b…

MALICIOUS

PDF

61.1 KB Created: 2020-10-01 20:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f4a9146462a80fd9fa4dd7020a3d6e34 SHA-1: 91d91cac76da04f8984d94485d6c7d6967b69b37 SHA-256: 23b78eccb4fc5a7b3c0ad44da0e148af5c53b8e102d316c6ea35ce5856e42e98
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ggtraff.ru/strik?keyword=bhagavad+gita+book+pdf+in+hindi In PDF document text
    • http://saruf.chezharold.com/uploads/1/3/0/7/130740003/vovajasuzude-xowalamupebo-wozibadama.pdfIn PDF document text
    • http://vobided.wakullagridironclub.com/uploads/1/3/2/3/132302921/ba3778832a9.pdfIn PDF document text
    • http://gipufik.davidrichardharvey.com/uploads/1/3/1/6/131606159/padobanobusogi.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://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/botany_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6131/2664/files/levana_willow_monitor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/britain_changes_its_colonial_policies_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/black__decker_battery_charger_home_depot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4528/9112/files/44796086346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0723/4207/files/71142806323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/006fc282-9027-40f3-afb4-66fde90bfa9e/39283538033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da757391-b5df-4631-a654-7c7bf7e4d77c/regavoximofesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78406d6-c725-4b52-894c-caae5ab244e4/doruvonelujoj.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000790f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 4980 bytes
SHA-256: 8f10a57bb3cdd544e2deaa163e6e9fdf707565ebcc03f6e8f530405d3b6d547d
font_01_sfnt_off000089f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F6 2204 bytes
SHA-256: 628b28b9c8cbb9adc091ec026b07f52ac3f6a3eea1f11b81413a5706ba45349e
font_02_sfnt_off00009402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9402 10192 bytes
SHA-256: b587654d61b0e6dca4d46e8b8f56c54688722bdafc431624d46db483db132e4f
font_03_sfnt_off0000b6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
font_04_sfnt_off0000c4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B6 10540 bytes
SHA-256: ecb356b8cc8e252163d83ddf0c888ea312673879bd55c9cc098d2d5fb7996b39

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