Malicious PDF — malware analysis report

Static analysis result for SHA-256 382e4ddbf62fcae5…

MALICIOUS

PDF

59.4 KB Created: 2020-10-28 22:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d5b8309e4c6c9d3dbaa542bbcbd4fcd3 SHA-1: 9f97e94a45f3694ec5c16518985cd8d1fd564707 SHA-256: 382e4ddbf62fcae5375d6f60b9a3dc14b0864e9e6758fb4d429aa14f547bcae2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though garbled, contains references to the malicious URL and other PDF links, suggesting an attempt to lure users to malicious content or phishing sites. No scripts were extracted from this sample.

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 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.
  • 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://cctraff.ru/strik?keyword=discord+server+widget+twitch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8e11f9ae30e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5f99c587c992c.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/wodorufaliwofu-xorirorot-lopenevi-lexawekukifo.pdfIn PDF document text
    • https://tirawinuzupufe.weebly.com/uploads/1/3/4/4/134445233/820331.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/rotazojegisuv_bujova_runanukule_pamizixizepip.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/0d7d68207e4957.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/zonunugezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f9370628f16e.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/xeboro_nodun_lawerefetukosi_naralulikiganim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f8ce8170f539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/pagilajafuxejitejufubuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9310/7902/files/dunagipowazitikopenok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/75368078267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8891/3592/files/7429048228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/fofebisidenewarepaji.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/ejemplo_de_una_acta_constitutiva_de_una_empresa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2887/9809/files/jogarimifikevimigezuw.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/brush_up_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/engineering_chemistry_notes_free_download.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_off0000a0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0CF 5112 bytes
SHA-256: fa87963f92d2422ba5a4304aba83d4537c20a51ca1aa64fbf66ca24aca0c78cb
font_01_sfnt_off0000b245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000bad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD3 10792 bytes
SHA-256: 73fe3d1905972f2490e468ce6b733c7e1cfcdd3406285f78ea6d87570c1a16e8

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