Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9766b6a6657c03…

MALICIOUS

PDF

81.9 KB Created: 2021-04-04 07:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 625e8bb68e130d46b2dd4480a61e00d0 SHA-1: 0920dcc050b5a7f8968ec183597a70f3e9252b39 SHA-256: 2e9766b6a6657c031afbe5b644b1150e013bfc952bc7fdae0101d38ac70fa235
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though partially corrupted, references 'Campus France interview questions and answers', a common lure for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/123?utm_term=campus+france+interview+questions+and+answers PDF link annotation
    • http://vurujupafowutox.mypressonline.com/84557421973.pdfIn PDF document text
    • https://sokifavobal.weebly.com/uploads/1/3/4/5/134514189/bigisi.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/1886225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_60675dd4399c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422631/normal_60009f7f5d93d.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/kivuvak.pdfIn PDF document text
    • https://gokokunebede.weebly.com/uploads/1/3/0/8/130874183/6724610.pdfIn PDF document text
    • https://paniselodo.weebly.com/uploads/1/3/5/9/135969975/3755b1b7.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/87566765169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_602a8e3348cb8.pdfIn PDF document text
    • https://nakofasojerurog.weebly.com/uploads/1/3/4/5/134592478/8639887.pdfIn PDF document text
    • https://zisuwurelexutik.weebly.com/uploads/1/3/4/6/134668326/3027497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406466/normal_6017a65456721.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374860/normal_5feba0fd9a441.pdfIn PDF document text
    • http://poruzotosiku.getenjoyment.net/24365718956.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/e5bd0.pdfIn PDF document text
    • http://gujozulogisin.scienceontheweb.net/couper_page_en_ligne.pdfIn PDF document text
    • https://fuzefiwojagolo.weebly.com/uploads/1/3/5/3/135308179/durojubinavaz.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/vavufekolezufelajot.pdfIn PDF document text
    • https://zawuziwoju.weebly.com/uploads/1/3/1/6/131636930/e4a396561a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suwuriru.onlinewebshop.net/79053000163.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/fernando_pessoa_portugues.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/69807060417.pdfIn PDF document text
    • http://nununad.myartsonline.com/40531371571.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/game_of_thrones_book_release_date_2019.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_off000101b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 5452 bytes
SHA-256: d519fddfe9abae11ceafea33557841e1ff95fad38094450e009fbb8758138638
font_01_sfnt_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 11104 bytes
SHA-256: b4c2977f7f2a72fe8db33d372f90665f18bb5d0189402dda8480872258c442f6