Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdf421d92266892…

MALICIOUS

PDF

87.4 KB Created: 2021-03-18 07:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2761c8ee24d54d32fe187b4054ffaf0c SHA-1: da5f8a2d4a1c858ab88ede6833e17cd9c33c2788 SHA-256: 9bdf421d92266892ef150efd729dfdf27d6ab8b5fef802d6929f2bb9b1689708
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which are hosted on disposable domains or use redirectors with search terms, suggesting a phishing or malware distribution campaign. While no scripts were directly extracted, the presence of external URIs and the overall heuristic profile strongly indicate a malicious intent to redirect users to harmful sites.

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://ponafet.ru/strik?utm_term=harry+potter+goblet+of+fire+plot PDF link annotation
    • http://itchia.space/nitenbt2hy.pdfIn PDF document text
    • http://medyayazilimtr.com/why_are_butterfly_knives_illegal_in_californiam971u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_604d6319cd23b.pdfIn PDF document text
    • http://tryporte.xyz/70643075784l9uxx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_602feba69b175.pdfIn PDF document text
    • http://turistik-a.ru/58370438732lx8tz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_5fdc18c275dd4.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/f56a6524-2dc3-4d16-9652-da066cacf6e8/jajefanodepijekimeloverok.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_8f71896a624743438f95098b7a560c43.pdf?index=trueIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_ad51b3f4a5c44d8ab2600748258ed15c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59ff749-962a-41d3-bf40-068c58ab9699/lil_peep_lonerism_hoodie.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/cartoon_tree_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/retencion_placentaria_en_cerdas.pdfIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_69ec8b30889d4a7bad92faf1c7625f77.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_4bde34a68655426fa7d0116d7bad7224.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5feb0569-7282-42f5-8caa-9d94df86a095/complaints_of_the_third_estate_french_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45d7ff8-5332-4b2c-8e09-5fb4baa40891/99339167895.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/how_to_clean_bosch_washing_machine_drain.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/difference_between_leader_and_manager_in_hindi.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_c48cee29eea54ef28f2d426dcd6a27f1.pdf?index=trueIn 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_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 5096 bytes
SHA-256: 9d087ccd0a76e40329f74acd62f29f8f67791fbff97bb0da5a3287687f89c6d7
font_01_sfnt_off00012a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A72 11180 bytes
SHA-256: 98ae2cbc22113ee9a8eaed5645faebf7cb4c300a397e3254f35ebd7b2109bc94

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