Malicious PDF — malware analysis report

Static analysis result for SHA-256 b756a1984360097c…

MALICIOUS

PDF

83.3 KB Created: 2021-03-22 11:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e72ac973b04126c9a8d6c692f2c298db SHA-1: 9763cfd9c29799954b79bb9817a0cb6d36c5a6d0 SHA-256: b756a1984360097ccf14f8aec7b03aaf6c906eec59e54780afaa3d7300ab5313
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=willy+wonka+and+the+chocolate+factory+death+scenes PDF link annotation
    • http://datab.vip/what_are_the_different_types_of_actual_arguments_in_functionpd4zt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_5fd3163d80fb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_603447a01991f.pdfIn PDF document text
    • http://bella24.xyz/15966982035w6opt.pdfIn PDF document text
    • http://private-channel.site/clinical_chemistry_textbook9a2o6.pdfIn PDF document text
    • http://opt05.ru/tonasuvonikemokinuplv1cg.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/dimovuroxofawef4flh.pdfIn PDF document text
    • http://instapriz24.site/free_audio_mixing_and_mastering_softwarenb8vu.pdfIn PDF document text
    • http://mozuganimaf.66ghz.com/niwomanawuredeniwekitilem.pdfIn PDF document text
    • http://doucheapp.xyz/553938484912gtc4.pdfIn PDF document text
    • http://rimka.xyz/1800864125f2w6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_ee3fe94553a046069f1b06a258abb52b.pdf?index=trueIn PDF document text
    • http://kediresij.epizy.com/61523237885.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/pofetupabawipazoluz.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/xobudiwubitazi.pdfIn PDF document text
    • http://mevomum.epizy.com/hyperlink_text_in_excel_sheet.pdfIn PDF document text
    • http://nopetavu.rf.gd/shoprite_bursary_application_form.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_a2d746ff92b04b4b850a09727b510ff0.pdf?index=trueIn PDF document text
    • http://tejutavufoxif.epizy.com/balloons_png_file.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/troy_bilt_4_cycle_tb685_ec_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/how_to_calculate_linear_velocity_from_rpm.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_3285aadf712746c4a8d9bcdf18d3fe3f.pdf?index=trueIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_d3b80f02530a4ec0b2ceebee1b7f6c2a.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_off000107b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B3 5380 bytes
SHA-256: 8e0ac4cfc0fa8cfa0323eb810ddd2aa322a55d3bcee0af4d91a69f366cbbfe0d
font_01_sfnt_off00011a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 11148 bytes
SHA-256: 25769ae205faa4b7a9b1ae545e7691829a61694bac02bde769e9096ba642da1e

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