Malicious PDF — malware analysis report

Static analysis result for SHA-256 7970cfd55ca8ea44…

MALICIOUS

PDF

63.2 KB Created: 2021-02-15 02:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 042494a47eb0293ed0246df090c7a4ff SHA-1: 76d5cbf32ffe64aa617f0f99394256023632a77e SHA-256: 7970cfd55ca8ea44e85febdd51335a4eaf04feeea96156f205cb8552b375a0d6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=curriculum+pacing+guides+south+carolina In PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/jaxoxul.pdfIn PDF document text
    • https://cdn.sqhk.co/duburijudi/Qqghjc5/pavuroretowesesezex.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/LidydI7/evolutionary_psychology_definition_short.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_60151d7c9ba76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6017f7f711a77.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/cy3hihd/jungle_junction_fly.pdfIn PDF document text
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/pimof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_602978222d062.pdfIn PDF document text
    • https://xusofudubivo.weebly.com/uploads/1/3/0/7/130775679/linafiwadilibew.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/6882916.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/ad0e577cbe.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/8110689.pdfIn PDF document text
    • https://cdn.sqhk.co/sudidoxa/YjcYjax/kuledaguz.pdfIn PDF document text
    • https://getaforufuzok.weebly.com/uploads/1/3/4/7/134733873/wipesexib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fedce9ce7bf1.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/jazofi/you_are_the_reason_lirik_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/ielts_reading_academic_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/codycross_answers_group_247_puzzle_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/wuriratofinep.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_off0000bbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD9 5392 bytes
SHA-256: dab0432edf0b47d4a394a1cfd810dfdc397c9862ad5c78efa7b819ca541d6cec
font_01_sfnt_off0000cdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF8 9800 bytes
SHA-256: 13b63f0327bec7af7fbced6393320ed7409fc7ca67a3a4aeb333690c50e87892