Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40d809b988b5055…

MALICIOUS

PDF

81.6 KB Created: 2021-06-08 03:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a3bc6ce9cf0428581c2f6d2e0136378f SHA-1: e7055c61b30c617452f088eae7ef1eb6b926e747 SHA-256: d40d809b988b5055017aa4ca695cf45c8d8c3bc7764e6b4ed1355dfd637204ee
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://huntic.ru/pbw?utm_term=how+to+know+batelco+balance PDF link annotation
    • https://pibefugaradaxo.weebly.com/uploads/1/3/1/3/131398186/sukenuleloxafe.pdfIn PDF document text
    • https://nobibiraxofos.weebly.com/uploads/1/3/4/9/134904538/8317401.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4470387/normal_60afe82414f10.pdfIn PDF document text
    • https://xuwukebi.weebly.com/uploads/1/3/4/4/134472968/rejuwe_wixidorelotuxa_tekitofowaba_nowepewazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_60198aff4f049.pdfIn PDF document text
    • https://ziropiwos.weebly.com/uploads/1/3/4/3/134311351/1b5634fa001fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_60222fbf911e2.pdfIn PDF document text
    • https://fodolirikixubug.weebly.com/uploads/1/3/5/2/135297927/wagaviwaruzak-fumamafodoxep-xetavasagexif-jatemajosukite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fd90aa5e4250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_603179749a648.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/cd402c1b-8372-42e3-928b-40d7fc6fc0d0/cloud_computing_for_big_data_salary_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8a8667-045c-40cd-888a-3565001134b8/42334264698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f5ee66-ea96-4c08-8812-d72e52b282ac/zomemegotefafulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41961d2f-acfa-4112-832f-80d2b17b13e9/casio_pro_trek_smart_watch_wsd-f30-bk_aaes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d528187-a749-4aca-8bba-5614830afd22/guwutoxolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c661d8b-f7ce-4c38-a674-31dc6b1266c6/tiwadazexupudibewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da1ec9e-3429-4430-a3fa-03757abac428/lulemevowugana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9d1272-bbaa-4e41-b357-422de27a9145/ego_lawn_mower_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3333374-c8a7-4df6-a216-02f08deddbac/dynamics_of_structures_theory_and_applications_to_earthquake_engineering_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd52648-284f-4f0a-944d-1937f87971c2/39358284423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b884920a-e173-40b3-a4de-c63c570ec856/20573227932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e38c7c-8d1f-4bd7-a576-af9fd11a193d/the_ordinary_regimen_guide_for_aging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5956d475-d8ab-47ec-85d7-9ad532c60918/gipimapoxutoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1260d746-2358-4449-bcff-9b42cca588f2/10653982662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8762dc20-5e69-4a8a-a8ef-9fd014fc8eab/best_book_to_learn_technical_analysis_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0b5c77-a088-44e0-afaf-7594ff840786/compare_and_contrast_the_structure_of_a_dna_nucleotide_and_an_rna_nucleotide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9347226a-76fe-49ac-b0ea-15cc08b290b7/would_appreciate_your_comments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e0b1a9-15f6-4815-82e3-6cc23f461057/puzosugopixakupigibutebir.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011e51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11E51 17532 bytes
SHA-256: b6409d6bf914d1a86285b2b27bc761cc1b6910b7bc4560704bfb37af19ba83bb
font_00_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 4776 bytes
SHA-256: 08c77df33512a6286f865431fe6ee46e163710845305c7865b1b95d92c0e7efd
font_01_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 10952 bytes
SHA-256: 2f641943416462d1dee6a8f48ac870d1ad3e5deafad4e1a03b00f61790ce329c

Open this report in the interactive analyzer, or submit your own file for analysis.