Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc39f23a13de136…

MALICIOUS

PDF

82.2 KB Created: 2021-04-11 02:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 69f0826a44856430c11b0e28470655f3 SHA-1: dbff782863b6f734c91d74b5da9998bdaa6e3256 SHA-256: 0bc39f23a13de136450fbc9f1eec61c57e40de5162cc5dc2951a4ae6a3da7d83
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to a product, likely used as a lure.

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 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://resalured.ru/strik?utm_term=bose+wave+radio+3+bluetooth+pairing PDF link annotation
    • http://wudenufodoroziv.scienceontheweb.net/list_of_important_days_in.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_6066049fabbff.pdfIn PDF document text
    • http://cookwellbakewell.com/kasoxuxuxefifiz66m0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_603c41db832f2.pdfIn PDF document text
    • http://ziduruwekomowob.iblogger.org/welogarukenawisesud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_606369c65d792.pdfIn PDF document text
    • http://uanews.website/tonivubaboguxek66b3.pdfIn PDF document text
    • http://fibilif.iblogger.org/86707734345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411512/normal_5ffddff2533c9.pdfIn PDF document text
    • http://libesikume.22web.org/66424358952.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/df3308a6-7122-4cd0-9db8-a23d6ab0289d/mean_median_mode_standard_deviation_variance_calculator.pdfIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_4d82de38fff54e0b8049b8b5cf72af34.pdf?index=trueIn PDF document text
    • http://xalixonawi.atwebpages.com/dilation_and_curettage_instruments.pdfIn PDF document text
    • http://voturugivorajop.onlinewebshop.net/88128082700.pdfIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_d0f7a844ddab401a91f6f55804211493.pdf?index=trueIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_32da1323c7af4a58b246e6201c7ae218.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc97355-232f-41bc-8123-b406f7dd88e8/motorola_radius_cp200_replacement_antenna.pdfIn PDF document text
    • http://jovuxajir.rf.gd/99270172745.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_2d2ebe21a07146cea43255d348b6db7d.pdf?index=trueIn PDF document text
    • http://morovewonapulaj.rf.gd/wigakowojaroba.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_off000103be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 5728 bytes
SHA-256: 2694145ed3dd246887e700a49b479f5ef8b110c138aecd92dfd2ba722287062c
font_01_sfnt_off00011746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11746 10660 bytes
SHA-256: 6d5379fc3025f29d1ba85c372ab118e4dcab69dbd5334af851ac27cc7d643472

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