Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f33756bfb68db2d…

MALICIOUS

PDF

58.9 KB Created: 2020-10-25 15:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 976a09a32c760bcf45bcd64464a62270 SHA-1: 2603295188fe9d7af984af92fc159700492b2361 SHA-256: 0f33756bfb68db2d3a2e89122624fc0329d005ca653b540c8ae80b4ff5abe445
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/123?keyword=bhagavatham+kilippattu+malayalam+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f8d84eda93b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f8b30fd8f50d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5f9308ad7f462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f8e123291236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f8874095c70e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8755a608f06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ebfd13c-6986-4c20-9b5c-8da0088cadea/xuxuvekomalisowovakizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f578410-954a-4764-a5ef-b69094e972da/86608103818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd73c4c-4db3-4137-8131-50cd6443a026/nazizavonaxos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c96477-6cbf-4702-ad2b-e534deca22b6/halo_punk_bilbao.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1183f8bc-5d89-4c26-a280-819ce27dede0/rarojikoveliduwilekerejug.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/xuxiwasibemogoxavolujivu.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/53188565476.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/resipewefuduva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4145c511-bb2c-46d5-addb-ee963f929c84/99037132869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f0553a-2761-4051-bb62-6b7fa00b0464/binder_clip_catapult.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B3 5456 bytes
SHA-256: 2142a47cefdbeb5350ff79e6ee62098cde9b831d081f1bad0be25bd72d488927
font_01_sfnt_off0000a730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA730 4348 bytes
SHA-256: 3dbb77c5031cb5f8fd857c823672aca40748b932112ddacf1287af6ec24d5ea2
font_02_sfnt_off0000b7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AD 11512 bytes
SHA-256: e54a2eab2f5b1e642673d1765bfb31068fda0da3ed8602432c58459ebb4d7cc6

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