Malicious PDF — malware analysis report

Static analysis result for SHA-256 d863f1244ae82b6c…

MALICIOUS

PDF

62.8 KB Created: 2021-04-01 01:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90a078c496e361840ff971d72c81834e SHA-1: 1add5efdc0a8f5864070832649eccb78dd602ec0 SHA-256: d863f1244ae82b6c3a81de47deabdac14a04093418f8a545a3ef6708c787511d
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing or SEO manipulation tool. The presence of numerous external URLs, many pointing to disposable domains, strongly suggests malicious intent. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

Heuristics 5

  • 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.
  • 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
  • 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://dugedepap.ru/strik?utm_term=7+years+lyrics+y+traduccion
    • http://ukrdomonis.xyz/penny_stocks_to_watch_for_today6q24i.pdf
    • http://wikowezenitezo.medianewsonline.com/how_much_does_respite_foster_care_pay_texas.pdf
    • https://givozerav.weebly.com/uploads/1/3/2/7/132710596/nelasexisata.pdf
    • https://cdn.sqhk.co/fazejitev/MFgi1bE/31307655557.pdf
    • https://cdn.sqhk.co/togixulala/Hdjhigc/tevoburudemifixififulofuk.pdf
    • http://findattime.com/wiwakirozibudinmdiq.pdf
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/pixiduzura_wuxonotaporej_bogulusunewe_zajugobetepa.pdf
    • http://sigisuzuk.getenjoyment.net/xevuj.pdf
    • https://cdn.sqhk.co/wujakegu/jPGwhdA/pulse_rate_range_for_covid_patient.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_f47315a2ece8479d92b93e89b6acaaf1.pdf?index=true
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_611ac0b98ae14e6c8af06e4c44b6a45b.pdf?index=true
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_e6ed86cdccf44e3abfc6145d4ab6a199.pdf?index=true
    • http://vafitinupisojud.onlinewebshop.net/vehicle_bill_of_sale_template_fillable_texas.pdf
    • http://noxukimu.myartsonline.com/fuforulowarafijidix.pdf
    • https://5e04165b-6ab1-49a6-9937-45006fc2fbeb.filesusr.com/ugd/d19879_cb5ce3a105d949fabd3364ad89faeb29.pdf?index=true
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_d686690012cd4e92a2e03f35e7d31897.pdf?index=true
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_615bab2fd7b4434497476264ddec63c5.pdf?index=true
    • http://gemovimuwopete.atwebpages.com/how_to_do_smooth_texture_ceiling.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9b.bin
f8fd0032d516896027b3b4b386e5396610eb86b11b6281bbdbdb7e3e00afb277		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 5020 bytes

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