Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0dd2356e53c6f2c…

MALICIOUS

PDF

84.3 KB Created: 2021-03-25 23:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0129874e66a0f0754b4d3f8dbcc17993 SHA-1: 2c09bb04b6fbe1d5affb18e2ee51f9b412941712 SHA-256: c0dd2356e53c6f2c33939590ffb63f26a41af599d491bdae193570ef6537de70
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is also flagged by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of external URIs and the nature of the heuristics suggest the document's purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/strik?utm_term=are+kitchenaid+knives+good+quality PDF link annotation
    • http://lulopoboxefon.scienceontheweb.net/asme_section_viii_division_1_appendix_6.pdfIn PDF document text
    • http://24goodstore.site/what_are_some_examples_of_enduring_issueslxag0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498348/normal_605aa1e7cf25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_6032c7b883d0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_6018b9e6dd432.pdfIn PDF document text
    • http://idclick.cash/gitimejog7srte.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/alphabet_in_cursive_writing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_601ede5b9468d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f20ce0-7585-4bf0-9028-12fd6692b7f7/graco_magnum_x5_trueairless_paint_sprayer_manual.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_d0c299292d104ebebb879a33930390df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a855b140-18ad-42a6-ac09-1efa5ff538dd/wapijanazorixel.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_7bb32fee48884011a20418b8bbe28be5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gusule/video_storyboarding_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/willy_wonka_and_the_chocolate_factory_2005_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92aa5eef-90cd-4083-867f-b0c0951ee211/36653005798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f717df7-20d1-43a7-b230-ce83f97f3dec/why_wont_my_toro_recycler_22_start.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/toto_washlet_s550e_installation.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF9 5544 bytes
SHA-256: 09808c74692ddd32cc2548a8e8982976fc04f7551f0d76e6e22a5095962e2e4c
font_01_sfnt_off00011fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD4 10756 bytes
SHA-256: 61785b8fc34c177cfae4c296d5a69f829fc8cc2aa5578f778a3112d87bde802b

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