Malicious PDF — malware analysis report

Static analysis result for SHA-256 8978e83a71a8b555…

MALICIOUS

PDF

66.6 KB Created: 2020-11-09 01:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cdba7acba9d19e3e17405f6a22fa411e SHA-1: 4d1ac27572ce55006a66a9bbef7c4bb94b3e116e SHA-256: 8978e83a71a8b555a6b649b12b2cb7412ed8d54fd5acbae414ea5415fe123756
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?keyword=the+four+little+tigers+of+asia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457848/normal_5fa37e9759830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f907b5a366e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8936b59c791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f8b7e6d8ee63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5f9c0cd5005b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://sebevikajexe.files.wordpress.com/2020/11/comment_devenir_un_bon_programmeur_informatique.pdfIn PDF document text
    • https://gefaxov.files.wordpress.com/2020/11/igcse_geography_edexcel_revision_guide.pdfIn PDF document text
    • https://bejagidet.files.wordpress.com/2020/11/fnaf_game_unblocked_scratch.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/10119010384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0337386-608b-4d11-a50c-e696658f066c/6226152530.pdfIn PDF document text
    • https://gigevuko.files.wordpress.com/2020/11/bejebivuxuxilutaxokakoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a7cc9a-c2c4-4e45-8274-bf02a78482b3/saxakudinupagag.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DC 4228 bytes
SHA-256: 81e214193b2c8daaeaaaab306c873812ba75933c859ddac11f9a16147fe6e880
font_01_sfnt_off0000a4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AA 4752 bytes
SHA-256: d28d7115062042eb21659b8c5cbdcc80dad7493e72b1f400bc843e2b15d5f977
font_02_sfnt_off0000b4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E9 4380 bytes
SHA-256: 5b7cfd012d648ac33342a4a37f379afe6b92284107607b9f9b0020ebde885973
font_03_sfnt_off0000c4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C9 13156 bytes
SHA-256: 4bc13ff53cb96077fdea6df601ea58dd3ed5116d6272b4955118feb5d4f79769
font_04_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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