Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7c0068df98884a…

MALICIOUS

PDF

72.5 KB Created: 2021-02-16 13:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8ec6879075986ab08b940ac5f0e82857 SHA-1: ce194a313c80e12c19e065453f25efb7b943a093 SHA-256: 7c7c0068df98884a415560db3c89cb5e99d43848c38444cabdc13b5744cbdb8c
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to disposable domains, suggesting a link farm used for SEO poisoning or phishing. The primary malicious URL identified is https://yafferge.ru/wix?keyword=catia+v5+manuale+italiano+pdf, which likely serves as a redirector to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=catia+v5+manuale+italiano+pdf In PDF document text
    • http://marketes.pro/8553805605704cpf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5ff26e78727d6.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/2615851.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/muwowadaferovudawa.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/sofawoz.pdfIn PDF document text
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/6268413.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/davetujetuw_lemipitufo.pdfIn PDF document text
    • https://pubabugolutaj.weebly.com/uploads/1/3/2/6/132680974/gowodizamof.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/413e7b.pdfIn PDF document text
    • https://nuranisemamev.weebly.com/uploads/1/3/5/3/135324344/supupebozozi_popuju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470981/normal_5ff79d90a42f2.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/zemiremaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fe7752697a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_602ada567233c.pdfIn PDF document text
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/kilabukokile_jetafuz_sujezenutoveve.pdfIn PDF document text
    • https://bofuvuwowu.weebly.com/uploads/1/3/1/8/131856225/nobasuwo-xikorisolekimu-nazopi-dupalakaxiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD4 5000 bytes
SHA-256: 35bf09269df4cdfb4b02b9608420e8f9966d2d02f55cae2f8b144924b87c6942
font_01_sfnt_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 10788 bytes
SHA-256: a201e41beb1cbd96bdc51faccaff5230eb4c98a68e5769470c23f642ea590892

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