Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f929a1fafe9e729…

MALICIOUS

PDF

66.6 KB Created: 2021-02-22 22:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cbaf938b38e70e1f46178fb77112736a SHA-1: 48cb9f0a475c416917be58d537de0c6b208067c9 SHA-256: 0f929a1fafe9e729d5460a71c653dfe4ba27887836ca25dc397fad3563580c24
246 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical finding for brand-impersonation credential phishing (Disney). It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. The embedded URLs and link farm structure point towards a phishing attack that likely leverages a client-side exploit to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kuxivudu.weebly.com/uploads/1/3/0/8/130813582/lozorafikuliwabi.pdf.
  • 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://seumenha.ru/wb?keyword=what%20is%20the%20empirical%20formula%20for%20c6h6o2 PDF link annotation
    • http://trynutra.shop/how_to_reset_consumer_cellular_phonehwvdz.pdfIn PDF document text
    • https://kuxivudu.weebly.com/uploads/1/3/0/8/130813582/lozorafikuliwabi.pdfIn PDF document text
    • https://vipoferizapil.weebly.com/uploads/1/3/5/3/135346342/bedekopesumugabom.pdfIn PDF document text
    • http://4kuhd.me/nier_automata_short_storyw8e7s.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/8275711.pdfIn PDF document text
    • https://fugopezawisobib.weebly.com/uploads/1/3/1/3/131383650/jimapa-wejibujemija.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/japavusupegixazex.pdfIn PDF document text
    • http://santand-es.com/j_a_c_ka_full_formf6yw8.pdfIn PDF document text
    • http://xrootunited.com/322339198844wk0l.pdfIn PDF document text
    • https://dewixazupeteti.weebly.com/uploads/1/3/1/4/131455636/f74ba1547a.pdfIn PDF document text
    • https://bofakodejo.weebly.com/uploads/1/3/4/2/134265658/pepavapagudeze_zinuxepozubixez_kanife_nopuxozoxeno.pdfIn PDF document text
    • https://vufagejibuto.weebly.com/uploads/1/3/1/4/131483336/c7661a08bf.pdfIn PDF document text
    • http://milanomodaitaly.site/benopusesipabupu7drg8.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/lasenuw.pdfIn PDF document text
    • http://megantv.site/mxq_pro_4k_android_tv_box_manualz1r3h.pdfIn PDF document text
    • http://autolombardpro.ru/tixamanejofugozubijenedaf22g3b.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/bobudasem.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/kazefefejepaw.pdfIn PDF document text
    • http://verification-help.business/kugibiruxadevenamonxh7fo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xerozovurewafok.epizy.com/nepunumovazavafasej.pdfIn PDF document text
    • http://gataluxogawix.epizy.com/35784292819.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_off0000c868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC868 5552 bytes
SHA-256: 0eb1b4f1c5bad5b862c8851eba27d54360a9dbc1806a967e1f8f96eaed71fe87
font_01_sfnt_off0000db2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 9852 bytes
SHA-256: 1acfa8ab8b6bca1e601c8e01e8179200a90a1bcf01c68143c689107ed0319040