Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e7f44633074cae…

MALICIOUS

PDF

88.7 KB Created: 2021-03-23 12:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7fa501a56a8f31d3882d30395f336680 SHA-1: 3e4c5fac66ea5586b8eb820d77b5cfef93c04208 SHA-256: 00e7f44633074caeb9a2182f0d0bd66a8ea57f5167994b9c7905a4e4e5cd796a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/award?keyword=nervio+facial+paralisis+pdf PDF link annotation
    • http://table-wait.com/lukogotuzowik2sfl.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/ggchinb/commodore_64_basic_programming_guide.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/2679952503xhf4r.pdfIn PDF document text
    • http://tuimag.ru/65810068804tidjw.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/n5Lifjc/sebagolebejuparifizof.pdfIn PDF document text
    • http://nolaxevoxuvelij.iblogger.org/ganagizowi.pdfIn PDF document text
    • http://idealsit.space/28113791383fvy7h.pdfIn PDF document text
    • http://lumolowopixu.iblogger.org/google_chrome_free_uptodown_pc.pdfIn PDF document text
    • http://xugilerasifoveg.22web.org/lepetazarixomif.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/hMgf1I9/sizukope.pdfIn PDF document text
    • http://vabakavolageni.22web.org/data_architecture_diagram_template.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://worubag.epizy.com/56377746261.pdfIn PDF document text
    • http://wefazerigibu.epizy.com/pirates_of_the_caribbean_sheet_music_book.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_16da586f4f454a098d085a4a1d44619b.pdf?index=trueIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_7a91e778e8a547559e8408e20a201bee.pdf?index=trueIn PDF document text
    • https://504b7f7c-d27d-4f2b-a6eb-e8dc7cf660cf.filesusr.com/ugd/6ba015_a540c5eb2d1b46a4a8d387f6bca62ffb.pdf?index=trueIn PDF document text
    • https://7920a853-f458-4dfc-a893-f50c3ed6f780.filesusr.com/ugd/fe7850_0c315fd152734403867cdd7462247335.pdf?index=trueIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_8fd8e02b73a1475b811b9b4e79fa57bd.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_298b5027c5d84ffcb13284c37640a40b.pdf?index=trueIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_334903187c6d4d20abf4dbce69f56f0b.pdf?index=trueIn 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_off00010bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC9 4780 bytes
SHA-256: 467e05920e33e12aa4a4b0faa83786863edca63d0cc3070d0def027d8e0272d6
font_01_sfnt_off00011c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1C 12848 bytes
SHA-256: dfb35ba33875718b477a764897d1e5257beab14f7bf6641f07fbae709315df91
font_02_sfnt_off00014597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14597 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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