Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bdeb7046053a85…

MALICIOUS

PDF

76.4 KB Created: 2021-03-15 18:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cf277294237ebc97dccd44c011bf7ec SHA-1: b3b3cf8ae1ea10d981f30d9b952d87b55924bf24 SHA-256: 49bdeb7046053a858232aef4d39e4ea6dab26f2ab545a43347d448f61ba2a9be
164 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which are disguised as downloadable documents, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=apc+ups+service+manual
    • http://meetporte.xyz/weladuzamazevinok4bndt.pdf
    • http://nuturejedekaw.22web.org/kubernetes_documentation.pdf
    • http://digitalmicroteter.xyz/77775248095zar56.pdf
    • http://wibeminijifenu.22web.org/patajupitoxabunepolodig.pdf
    • http://sallely.xyz/colorado_ballot_initiatives_2018_guidectav9.pdf
    • http://prizinsta.site/labour_law_books_free_downloadgvvro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_ef85c131dfb049bdba3860f7b868700d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b76b2b3b-fec4-4e20-b3aa-31fc422d1c69/how_to_get_mp3_on_iphone_11_pro.pdf
    • https://uploads.strikinglycdn.com/files/1c9cc0bb-b058-4010-b2e2-d2304f53952f/5278163599.pdf
    • https://uploads.strikinglycdn.com/files/7132f44d-986f-48df-93f0-fd259d70ba42/4604760342.pdf
    • https://s3.amazonaws.com/litunux/49162433207.pdf
    • https://uploads.strikinglycdn.com/files/8098dd7d-a672-4db0-a288-5ede70713757/2006_vw_jetta_tdi_oil_reset.pdf
    • https://s3.amazonaws.com/pipaneku/vowewat.pdf
    • https://uploads.strikinglycdn.com/files/db8d5475-9290-42ff-992e-d6f300eca13b/how_to_use_oracle_database_19c.pdf
    • https://s3.amazonaws.com/woberiz/cough_suppressant_pill_form.pdf
    • https://s3.amazonaws.com/sefepugolupalax/fannie_mae_investment_refinance_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/e63b237b-35b2-4ed8-9f5a-8c267fd51510/nancy_drew_hidden_staircase_1939_part_1.pdf
    • https://uploads.strikinglycdn.com/files/cdc7d93f-db16-4406-8be3-dd2c761f03ee/how_to_find_the_outer_shell_electrons.pdf
    • https://uploads.strikinglycdn.com/files/563f7893-06e6-44cc-976f-e2fa23e76105/the_redemption_project_episode_1.pdf
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_5e798c4c29164c518fc3e0215c0751e8.pdf?index=true
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_0402b93b4f634c02870bc909cb01f2a2.pdf?index=true
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_0c552690e7ff434ab69734e497314eef.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9d790bb4-30b0-4aae-bbbd-65c5826b55af/lamubileku.pdf
    • https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_1f64cd1016de412f89fb7800ad4b3450.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c6.bin
333efda69edd15252f0cbf3bebb615cd68aab3485c0829f4b886c376700b29bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 5128 bytes
font_01_sfnt_off0000ea1e.bin
bdae47d2c2de32c530a2bee65befb3eb56a62584d0b44560929045940bd5f4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 2012 bytes
font_02_sfnt_off0000f3ba.bin
ec763f96ca73b76f0bc47ed81c57afcbe98dcdda2c6b2137addc6b12b26bbe7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 15728 bytes

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