Malicious PDF — malware analysis report

Static analysis result for SHA-256 264ab60a6970bbc1…

MALICIOUS

PDF

81.3 KB Created: 2021-06-11 02:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e6677a00165ebe7cd6e0b6b5fc60562d SHA-1: 0a5b9fa9f29fe21ad488ffe266a59d2ef6c49946 SHA-256: 264ab60a6970bbc13f8270f6969ba7c9c3e634b4e6dfda275358f85fdd3ddb81
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing. While no scripts were directly extracted, the presence of numerous external URLs points towards an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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 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.
  • 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://pistant.ru/pbw?utm_term=pokemon+go+fgl PDF link annotation
    • https://zasipirowi.weebly.com/uploads/1/3/4/2/134266189/kerideg-daraxopadogot-banokox.pdfIn PDF document text
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/6908153.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415073/normal_5fde87c7324b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_603b7f9049e25.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/35fb0c658baa45.pdfIn PDF document text
    • https://metumarexidema.weebly.com/uploads/1/3/4/5/134591821/ef55495.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/d0b75c.pdfIn PDF document text
    • https://mijekonepe.weebly.com/uploads/1/3/2/8/132815105/kubexe.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/9765653.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/1794168.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/mosako_magigeb.pdfIn PDF document text
    • https://loxekezipoga.weebly.com/uploads/1/3/4/6/134678149/5996069.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/5dbf5148-6632-47a9-b957-228c7c43814f/87339789246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a711cc-5d72-4726-b52d-7895a34b9a01/how_to_change_photo_into_painting_in_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c925369-fa3f-462e-a7d6-a93a52bfbc17/business_communication_chapter_14_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a4c37e-ca21-4744-81a3-63c94461025a/36650097073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b397b955-65c0-4bee-8de9-345547c86a40/exploring_chemical_analysis_5th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaddcc7-20a7-4a37-a607-50544b8192e0/16897561171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f01480-6e85-4ded-afba-a7f4bee6a02d/what_is_the_best_sao_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb8abe1-cc95-4c20-b256-2cff389af494/laboratory_manual_in_physical_geology_11th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575fea17-3e42-430e-92df-0ee681f37666/wezewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903ae9af-257c-4c03-9720-5b78d437facb/57013130090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f96a60-ac0f-42b6-897a-489121e1a6e6/what_is_the_purpose_of_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3269de85-226b-4511-8357-5a828ccb2089/retanoruzibete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db0c8be-09da-4fea-be76-12dae41a79fe/invitaciones_de_unicornio_para_editar_con_foto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44bac9b-8d79-4397-bb71-be1184294bf2/how_to_handle_a_child_with_adhd_and_odd.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_off0000ff30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF30 4668 bytes
SHA-256: 234d43cb30237871f4d2cef3daf4758729f5aa3794b7a0e39bdd2114d4edbc57
font_01_sfnt_off00010f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F16 12984 bytes
SHA-256: f29eff5699924ce386cc658ab3ea7ebeecae1c005f6aa0783eb1e92c31498b6d

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