Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd041e9102fa3fd…

MALICIOUS

PDF

45.7 KB Created: 2020-11-05 22:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2b98172f1a4655aa1d504036e0de0bb8 SHA-1: d9933b39e5df2a5a588624b6d89b71865f5ffa79 SHA-256: 1cd041e9102fa3fdb3e3673910cc6b2b5071d2427a119779c014749db0946ff1
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/123?keyword=full+cast+of+original+catch+22+movie PDF link annotation
    • https://lejoxenususoja.weebly.com/uploads/1/3/4/4/134497781/3291524.pdfIn PDF document text
    • https://bofunakepubosux.weebly.com/uploads/1/3/4/3/134371141/ed81c727f24e0af.pdfIn PDF document text
    • https://ruvazokof.weebly.com/uploads/1/3/4/0/134040659/duzunom.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://uploads.strikinglycdn.com/files/c0906078-6608-4fc7-97a7-513775f26af7/dojadefofuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0430c854-af8f-43ff-a644-d0228658e9ec/adobe_cc_fireworks_A.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/schultte_basteln_vorlage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fd2c04-a19c-4a25-891c-e106c40eb12e/quo_vado_streaming_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da207903-8c42-4cfc-981a-c7ac21276bf5/50939898688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0993c8eb-f766-47e9-bd2c-6662881d958b/80965554526.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/roblox_song_id_list_pop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45188a32-240f-4b57-b965-01e82f0b5b3d/5789179957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd1a3bf-36c4-47f8-b521-4b9c2ec1e4ba/66636353475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8c2a80-9076-4ae3-8547-dc65da86b1a1/sewuwazekagal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc7321e-ec87-4649-9c9b-ee8fb61fd910/78339672831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d375f8-c4eb-45b8-8655-510e8fa0ab6a/40796125756.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_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 5324 bytes
SHA-256: d6b617960e3e5a12ffacc682ad07c1416cc6e477195dfd6fba8ead172bb71636
font_01_sfnt_off000077df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 10520 bytes
SHA-256: 505c8844e72a01ccfa96b9fa132590b810f34ac104ba42841ad5ed1d3554f8af
font_02_sfnt_off00009bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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