Malicious PDF — malware analysis report

Static analysis result for SHA-256 687f955f7f2362a4…

MALICIOUS

PDF

37.8 KB Created: 2020-10-06 12:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: faa0cf38e7b9295aafbabb9ad897df42 SHA-1: 18f125f43ac2578bbec9dbf08ecde056b9b2108b SHA-256: 687f955f7f2362a40154032201660beeddb7379407b87343626829d30f85cdcf
124 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that align with a phishing or malware distribution lure. The ML classifier strongly indicated maliciousness, supporting the conclusion that the file is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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/pify?keyword=bill+thurman+lexington+ky In PDF document text
    • http://jenuze.keithmiles.net/uploads/1/3/0/9/130970004/ritavebinefuveg.pdfIn PDF document text
    • http://funeduv.newlifeglobalministries.org/uploads/1/3/2/8/132814930/tuvufoweda.pdfIn PDF document text
    • http://vipiw.stpaulsboxhillfish.com/uploads/1/3/1/0/131070306/wowekitifive_kexiburojatadu_nividigesomad.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/40294936788.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/84026558032.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/53071871703.pdfIn PDF document text
    • https://site-1037865.mozfiles.com/files/1037865/pudevovedijikukes.pdfIn PDF document text
    • https://site-1040884.mozfiles.com/files/1040884/jorosojolosuwenujaz.pdfIn PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/45598791257.pdfIn PDF document text
    • http://katonoke.habbofis.com/uploads/1/3/1/6/131607163/89032c.pdfIn PDF document text
    • http://files.careholisticcenter.com/uploads/1/3/1/3/131383607/diret-vusutip-timet.pdfIn PDF document text
    • http://files.russcrick.com/uploads/1/3/1/3/131381464/3465243.pdfIn PDF document text
    • http://xoradi.zzaircrewreunion.com/uploads/1/3/1/4/131407995/e3fb04de2.pdfIn PDF document text
    • http://files.zionlutherancc.com/uploads/1/3/1/4/131438197/nujisu.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://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_off000048c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C9 5088 bytes
SHA-256: b4fb4b5eda20a4bc2a4672305b624e5fd65a2d2b707d6ea3a241849af877ee13
font_01_sfnt_off000059f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F0 10136 bytes
SHA-256: c8971ad692a60f4fb8fd8dd3756c705f899dc946c5f9b0c2342afcc87f73aaeb
font_02_sfnt_off00007ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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