Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b71b295cf0ee435…

MALICIOUS

PDF

103.3 KB Created: 2021-03-28 09:38:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dc44eb7ab21d779b87606625870f9141 SHA-1: c60a48b8f9c2cdeb257cc3da1b5b6b6c758dfb2f SHA-256: 9b71b295cf0ee435014ea705d0a16194aea16e263da75a1172c8afaf50f2e8da
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 0.9998

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://gimoguvi.ru/wix?keyword=anton+paar+dma+35+version+3+manual PDF link annotation
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/2abec12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_603cb855b3071.pdfIn PDF document text
    • http://zegobudipaju.mywebcommunity.org/types_of_biotransformation.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/ciencias_sociales.pdfIn PDF document text
    • http://wexypay.icu/zideruzebowuse7qe7n.pdfIn PDF document text
    • https://lojodisomu.weebly.com/uploads/1/3/4/0/134042672/1011345.pdfIn PDF document text
    • http://snt-br.ru/baccho_ka_cartoon_freedvxld.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/fumulajovu_lifawu_jabized.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_60380d537b8e3.pdfIn PDF document text
    • http://all-system7.work/tekanakojarisofemej3off.pdfIn PDF document text
    • https://jurozujuzofu.weebly.com/uploads/1/3/4/8/134875655/jidazawupe-vigagunivilafi-dodemu-lamar.pdfIn PDF document text
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/6329473.pdfIn PDF document text
    • http://summ-green.fun/what_food_did_they_eat_in_ancient_greece7szy4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_60395ca32d850.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/surah_al_mulk_rumi.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/instructivo_de_manualidades_en_ingles_y_espaolrqkd3.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/business_plan_restaurant_bar.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/a3287f8e-aba9-4cae-bc36-f680223e278e/velizef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fad478-7e2c-4726-804b-191b776b7015/rod_stewart_the_great_american_songbook_volume_iv.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_off00015082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15082 5444 bytes
SHA-256: 393bb73e06dd562f19fa59f042c216d5956919b8d55deac900213a1f32dc07ec
font_01_sfnt_off000162f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F8 13868 bytes
SHA-256: 7f594c66773b443bef8f961dba58be9434ab15791396633428286ead5fa8de8b

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