Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b8e961eecae806…

MALICIOUS

PDF

78.1 KB Created: 2021-03-31 07:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ad0b35aa488d7f48a6592c89245840d5 SHA-1: 2676ac0c3341b0681e636d0c0460297829d52345 SHA-256: 32b8e961eecae806b84402664e6a2bebae73d55ed9620d007d4ff07f3c2f342a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://lozipotod.ru/aws?utm_term=q+es+una+propuesta+de+valor PDF link annotation
    • http://microbestdigitalmeter.xyz/heat_transfer_j.p._holman_10th_edition_solution_manual3hnb8.pdfIn PDF document text
    • http://antonioit.space/very_sad_life_quotes_images_free_downloadkxuy4.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/dijag-mewozoxegik.pdfIn PDF document text
    • https://zepazilarewar.weebly.com/uploads/1/3/4/3/134310653/7b0d5469526.pdfIn PDF document text
    • http://limaxinsto.xyz/kuwizuluwejesesavoxuwolugq4x8.pdfIn PDF document text
    • https://gidunixodon.weebly.com/uploads/1/3/5/3/135322071/6593112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490265/normal_5feaef32b0a24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_605968a08a4de.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/f5c5347e7.pdfIn PDF document text
    • http://cactusvpn.live/food_giant_hueytownd72zz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bodajaku/ibm_blade_server_configuration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a653d2a-f3ba-4f34-9cb6-c5fefe4d53b4/2005_honda_trx_350_oil_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/cambio_climatico_causas_y_efectos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edb0f77-4dcb-485c-86e6-690390160a8f/bodyweight_exercises_for_back_fat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511cc139-4fc9-4ad4-b9e9-0d936e629d0c/90647541466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3671f7-f27c-4fd1-953d-3308ca616811/fipokuzufosiliwemazodigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4b8025-e13e-492f-8b31-a817b8575e01/66344956056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb57f2cd-dcc6-4286-85dd-405e53b1f5f0/what_is_isentropic_efficiency_of_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08798651-448c-4312-9b64-3b535093eaca/tudorutimalewixawuvufa.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_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 5072 bytes
SHA-256: 997b49f1f1a58e5232be777b76f80ff879381cf6d7ca36830b32dd05b9b617ad
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 12332 bytes
SHA-256: 36ebea3635d26bf725867e2ba84781433d463b5831f6a3bdd934b03f845da2d7

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