Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82d777dd0415bdc…

MALICIOUS

PDF

66.7 KB Created: 2021-05-17 00:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 454ef9a882c9b737ac2b756e07e84147 SHA-1: e654e1c85bb0c1af037c004e44fdc25a18773087 SHA-256: b82d777dd0415bdcafc2861d1d7b33892c075b0a399d4b7f071c61e40c75fe4e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs further supports a phishing or malware distribution campaign.

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://jumiwimov.ru/strik?utm_term=abu+garcia+silver+max+combo+review PDF link annotation
    • http://waparudadip.mywebcommunity.org/fuwobawikatufivurut.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/zevomobixigoderaliw.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/chamberlain_garage_door_opener_not_opening_all_the_way.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/iLOgeuo/36340535966.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/hiahfF0/sports_tracker_running_cycling_mod_apk.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/59771901628.pdfIn PDF document text
    • http://xazonojader.mywebcommunity.org/case_files_surgery_5th.pdfIn PDF document text
    • https://cdn.sqhk.co/jadojibam/ghjedaV/reckless_getaway_1._0._7_mod_apk_download.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/dragon_age_inquisition_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_bd62de1c7adf4f4a99ec0aaefe3efb0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/73268412272.pdfIn PDF document text
    • http://desujiruvomeb.myartsonline.com/xirukile.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_c26927fc1c314816b985481734ce4cbf.pdf?index=trueIn PDF document text
    • http://dexadusoxeb.atwebpages.com/78809775706.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/gotikudekoxupavovuxuna.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/christ_hospital_school_uniform_history.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/sub_zero_fridge_repair_vancouver.pdfIn PDF document text
    • http://leparitupoxow.onlinewebshop.net/breast_cancer_types.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_f482a4cafcbf4cdeb0136a2111953335.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_off0000c820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC820 5468 bytes
SHA-256: de10444960d614cf009c275b2b220b105576e57b021e03892c990faa35052afc
font_01_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 10208 bytes
SHA-256: 84694b54795d261b89cd4f804b0661446bb2f271ed49cc01b3ee5305c155a982

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