Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e76e79220fcbd4…

MALICIOUS

PDF

78.8 KB Created: 2020-12-26 02:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 73fe36a31425fd828ec335fc2835b409 SHA-1: f1a521758f3b3d3f81d5d1720767d355bf34d455 SHA-256: 02e76e79220fcbd45f600dee695173983d0ebd6c20517ddfee7f818c5bb86382
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to improve search engine rankings, and one specific URL points to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/wb?keyword=glow%20hockey%202%20download PDF link annotation
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/191caa2f70.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/DWJicKG/flying_birds_gif_download.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/0510e770fb99.pdfIn PDF document text
    • https://cdn.sqhk.co/dufadafakuti/L7XKmhj/48258627100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_5fd90e924f160.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/rawesaragegugar/71568402273.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/vudapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a144e3c-f4d9-47dd-9cea-de4507c7af4e/acer_v3-_771g.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/acronis_disk_director_12_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/36923663775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ea0e6f-8f44-473d-a474-659664577f18/honda_gcv160_spark_plug_gap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c571c38d-5338-4404-ac2c-0a983a418eff/pdf_files_free_download_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a743078f-f9f9-4fc9-82be-979a1d80d9ac/precious_moments_collectors_guide_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e618fe89-c44b-43cf-a5a1-f8396a5c88d5/xetawe.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/sawiperosijogel.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010749.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10749 22948 bytes
SHA-256: 10f3803b5c0b7b6044359f0bee239f2b32cd2982788294e7c5698da68b73afec
font_00_sfnt_off0000d1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D5 5172 bytes
SHA-256: 38426f7bb2feec15a4a5e132afd066bda8bd5c10090924ea9612669a0831c222
font_01_sfnt_off0000e38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38C 10432 bytes
SHA-256: aab35c62e1782f4ee249872eca2aaa327aae7708dfddb5b37318466fd930218b

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