Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a588ab1d9ba105…

MALICIOUS

PDF

90.3 KB Created: 2021-06-07 21:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ee39e65594a21d3400db54ba148c9379 SHA-1: 299c208a4aa2317d8d4486b43065d7b26a9354b6 SHA-256: a2a588ab1d9ba1051fe3c5e7ef0a602f6ca8b370aa35f60d2ceafe449264f9ca
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/123?utm_term=nj+eticket+reports PDF link annotation
    • https://vedasozeseso.weebly.com/uploads/1/3/4/3/134388395/doxezapisubo.pdfIn PDF document text
    • https://zogoxakemu.weebly.com/uploads/1/3/4/2/134235374/3700591.pdfIn PDF document text
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/xomudid.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/a97432.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/xudevutezelejupaki.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/favefenizajupenub.pdfIn PDF document text
    • https://bewobuvepo.weebly.com/uploads/1/3/2/6/132695749/791118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tozuxexap.pbworks.com/f/86356872420.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/91615395176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9263ceee-5c1b-42bc-8d77-0897f7ecba03/vuzejafanezinokirepux.pdfIn PDF document text
    • http://litorabi.pbworks.com/f/totally_bath_tension_pole_shower_caddy_assembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7080e30-448e-48ee-9bbd-57fdc7bc3893/como_hacer_una_propuesta_de_valor_para_un_negocio.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144575055/23311147559.pdfIn PDF document text
    • http://magogopowo.pbworks.com/w/file/fetch/144475743/19736250900.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/f/moxatevuvon.pdfIn PDF document text
    • http://vedufid.pbworks.com/f/essentials_of_biostatistics_in_public_health_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad389017-a6f5-415d-8f3a-2ef1b58aa742/christian_couples_counseling_near_me.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144466758/zifutudebidozogatejozeja.pdfIn PDF document text
    • http://xofitesu.pbworks.com/f/lego_a_wing_instructions_20202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D49 4796 bytes
SHA-256: 0bf502461b15e5a81a7b6c642fc7aed53a9ce324c87383ab884c7d11513225a3
font_01_sfnt_off00012db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB1 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001363f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363F 11132 bytes
SHA-256: 5f78b5da5f52a56fcbd5f693e1121076c12aee6833a675eb973d71409bc0d385

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