Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ba397e4cc3c7ea…

MALICIOUS

PDF

79.0 KB Created: 2021-05-14 14:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e11e7510462ecfe0a06bfa5a94909af5 SHA-1: b69c38d082b982b2e29a0504fc0cfb117eb1a57a SHA-256: 32ba397e4cc3c7eaa7bdbe460062d49aa81e01beb0781a0bd61cee866bed9fb7
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 multiple external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to a 'Mackie 802vlz4 8-channel mixer manual'. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=mackie+802vlz4+8-channel+mixer+manual PDF link annotation
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/kedaxolini.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/novijamomopisa_lobevedoxigad_tivunuti.pdfIn PDF document text
    • http://dekovag.mypressonline.com/23383198194.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/4478687528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419847/normal_6026a5f44a642.pdfIn PDF document text
    • http://bagezokazuraw.medianewsonline.com/baciloscopia_tuberculosis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_5fda3ab212a3b.pdfIn PDF document text
    • http://dusamoka.mywebcommunity.org/what_type_of_oil_to_use_in_a_generac_generator.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/how_do_i_connect_my_hp_deskjet_3051a_to_wireless.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_604610270a04b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449777/normal_6002f6c6136b8.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/47507086641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/words_ending_with_ology.pdfIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_f8a3f8ed80974196bc60937a03795bc2.pdf?index=trueIn PDF document text
    • http://teluroluxeterez.myartsonline.com/frutas_que_nao_tem_carboidrato.pdfIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_c49d948942fa433b8678809c8bd89523.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/395868ea-a705-44db-a320-1c79bb3b87b7/power_pressure_cooker_xl_cooking_pasta.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_cca7b356bf6a499b960a7845dac25c5e.pdf?index=trueIn PDF document text
    • http://xowobovu.myartsonline.com/libro_adrian_paenza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d07d80-396f-4126-ab7a-5292992ea83a/fotalafifejozug.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_29ebb2913cb9476d917db32c47b07dcd.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_off0000f48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48B 5696 bytes
SHA-256: eb1117ecec8846efb6823420e2e10f54919afdcbfe82fc0625842afd5ae0d7d3
font_01_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 11256 bytes
SHA-256: 49f98b6656498e16904e312d78bc60ee4e62400dbc824e4f9cc88672042436d1

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