Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46f5164c9f1a15c…

MALICIOUS

PDF

87.3 KB Created: 2021-05-12 11:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 13d98d84990ea26c7ab73366b9fe7ca2 SHA-1: ec000f9db8e717b0e10a4b2b510fec3678e8203c SHA-256: d46f5164c9f1a15cd0c8e6edba075ada686f1c21501baccdd22ae4ac3273da4f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to a suspicious domain ('xezojetit.ru') that is likely used for malware distribution or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious resource, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=what+is+the+american+standard+version+of+the+bible PDF link annotation
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/gepifevunekoviziv.pdfIn PDF document text
    • https://dunipilulu.weebly.com/uploads/1/3/4/8/134880259/tesimozurojez_fivefupun_batot_zivew.pdfIn PDF document text
    • https://wanuzixa.weebly.com/uploads/1/3/1/4/131482886/13ecc7597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/atlassian_support_platform.pdfIn PDF document text
    • https://cc67bef4-e22e-42fd-bf01-3f02b15f800b.filesusr.com/ugd/080020_e27a81f794014f92a19c03512334cc0c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a39d9c-877d-4549-9ff3-4071c9872dbf/sorulutotobib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c348fe80-5b14-46ee-9a03-3981989d69e6/after_we_collided_review_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9cc002-1424-4226-81ea-0789421006fe/how_does_the_10_day_smoothie_cleanse_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6b4882-91ea-4cdc-98b9-8125b7ab6493/tewavi.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/rukofasipidatowivevuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/brochure_layout_design.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_c810e59ad2b64adb875e9d1009fd73fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05819fdb-3435-4497-9438-3de7b1cdce52/zonowino.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/safipeboda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41b44b8-232d-4a9b-a726-1fd648b4ef93/windows_keyboard_shortcuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c087c9e3-4693-45e3-93c8-f32318f2a32a/1st_peter_bible_study_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9dad82e-ebe1-40bb-8c82-1d69ddb18385/netiba.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/nail_salons_open_on_sunday_in_birmingham_al.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_off00011882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11882 5472 bytes
SHA-256: f5a041cd6fee0738b74186cd3511846e84706c6cb04f92c568ad7166940b6ecc
font_01_sfnt_off00012b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B07 10696 bytes
SHA-256: e1de13b9211c7b764030932ee9c9df4033a40d66892df4982b4629e24411529e

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