Malicious PDF — malware analysis report

Static analysis result for SHA-256 9002e24be0290fc0…

MALICIOUS

PDF

87.9 KB Created: 2021-02-14 20:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1ed7fa3904908d77cf53c2357cb1ff3a SHA-1: b2bce1048668734aa8054bc973b7df22e1b5669e SHA-256: 9002e24be0290fc0520b00ce8c4191f25df33721aefb9f9a4a1cdbd7e38df22f
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://yafferge.ru/wb?keyword=galvanized%20steel%20sheet%20lowes'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as a phishing trojan.

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://yafferge.ru/wb?keyword=galvanized%20steel%20sheet%20lowes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_601f57cc512e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_600e7c465f06f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_601cf6f56da0b.pdfIn PDF document text
    • http://anarchymedya.com/reflection_mulan_piano_sheet_music7opl2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_6021c399244d5.pdfIn PDF document text
    • http://opensalon.xyz/lodefejugowebokus3ltqa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388289/normal_5fe0be56bba00.pdfIn PDF document text
    • http://azorocheat5.xyz/zodamalemidezurizarvup33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481821/normal_5ff8a225709ba.pdfIn PDF document text
    • http://apparently-home.com/fundamentals_of_chemical_reaction_engineering_solution_manualjy9ot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466413/normal_5fe283fb3eea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_60252697bfd4d.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
    • https://s3.amazonaws.com/jaloto/54831114411.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/26353317247.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/the_ayub_khan_era_lawrence_ziring.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/hello_bixby_apkmirror.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/47664521178.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/57792147341.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_off00010d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D49 4840 bytes
SHA-256: 2e4174dfbd8ecfddc0ffc970b9bfcc91d1c5e404b6ae8777e52b7ab7fb6914ad
font_01_sfnt_off00011dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD4 11608 bytes
SHA-256: 8fef895f43f7a12e0e0b6dd3d10ca2e48ae399cb2bf9e25e2cb018a0bc851bde
font_02_sfnt_off00014466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14466 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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