Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff006fb4b997458…

MALICIOUS

PDF

90.5 KB Created: 2021-03-28 10:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54194bd0445d0cb1c01802a5e48aa708 SHA-1: 72a7f8d7715c6566b319631f3d46130beb4cf877 SHA-256: 9ff006fb4b9974588f012d7cf3d23d412dce59780e84163ee165253693dd2111
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 0.9997

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/wix?keyword=is+edx+certificate+legit PDF link annotation
    • http://future-techno.ru/selilupivimutipuba2q5dl.pdfIn PDF document text
    • https://ninozaji.weebly.com/uploads/1/3/4/6/134690112/ratebizivafa-bezogebubimapud-timevo-polexukek.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/Thagvid/info_about_kobe_bryant_crash.pdfIn PDF document text
    • https://cdn.sqhk.co/mebinolopuf/5e2BhgJ/glory_ages_samurais_apk_download.pdfIn PDF document text
    • https://lawoxotat.weebly.com/uploads/1/3/4/5/134587222/peresijupifipol.pdfIn PDF document text
    • https://fibunijir.weebly.com/uploads/1/3/0/7/130740490/c794131.pdfIn PDF document text
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/b0a87.pdfIn PDF document text
    • http://copyright-services-us.com/80035736381dcz05.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/65578457291.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/diguxifobatodoji.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/hcIAgjk/bosidorebagamoganibojomi.pdfIn PDF document text
    • http://sandiego-podcasts.com/derecho_procesal_civil_publico_o_privadoggn11.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/ee96e1ae-01df-4e75-a2f5-e729063a1154/generac_gp3250_generator_price.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/best_hunter_pet_dps_wow_classic.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/tabekexogemarawez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd65a981-4db9-4246-94ca-aad431cf65b1/wedokamuzixu.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/23388703993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4f91cb-58dc-4c16-97ba-c430b8110dee/81395909515.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/ejemplos_de_dialogos_cortos_para_nios.pdfIn PDF document text
    • http://tivexedasabuxi.myartsonline.com/probiotics_and_prebiotics_in_food_nutrition_and_health.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/tevebedaligazisudutad.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_off000123c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 5192 bytes
SHA-256: 22353d46a98d9d59ec2226d86e9acf8b5e7d1aa3d24654e840103bc0d3170e3e
font_01_sfnt_off00013584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13584 11832 bytes
SHA-256: 19349b6cb87bb0af3242fd2d4bf5244871186c53fb32e73c430b5c3da5400e84

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