Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7f1fd139d6aacf…

MALICIOUS

PDF

81.3 KB Created: 2021-03-10 16:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d493527bfd6a7ddfe7231f5a0452d429 SHA-1: c4e9861cd5b66ca889d5af56dce21807e90d55cc SHA-256: 6f7f1fd139d6aacf1551953811af049aa7d74e27d612f4568bf5fbdc778a67e8
206 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, characteristic of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO manipulation or to host phishing content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://golowaki.ru/123?utm_term=camden+parking+suspension+application+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5fd968f81fe78.pdfIn PDF document text
    • https://luwakanit.weebly.com/uploads/1/3/0/9/130969899/wagiral_xekubevelugo_kizelitanod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452199/normal_5fdae0fc2e73a.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/ragifaxeporem.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/5833581.pdfIn PDF document text
    • https://ponasamexow.weebly.com/uploads/1/3/1/3/131398296/nuliwapotire_wufowesizev.pdfIn PDF document text
    • https://wufezaju.weebly.com/uploads/1/3/0/7/130738917/fewazikutovanirebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_6037cd4a51d44.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/bazozasizebog_safapiteruzewuz_vulobijisuzi_buzorulezuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_60247307ee45a.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/jiduxukarajimekaz.pdfIn PDF document text
    • https://jijoforupet.weebly.com/uploads/1/3/4/8/134864875/dasesipatelekat.pdfIn PDF document text
    • https://tupipano.weebly.com/uploads/1/3/4/5/134598946/senatixabiwive-woviw-rijujowumafu.pdfIn PDF document text
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/jelas-tupurobotapi-mezunojigu-jolone.pdfIn PDF document text
    • https://xusezazidajitov.weebly.com/uploads/1/3/5/3/135325201/1097736.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/vilat_duvewexigam.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/e9aa4053.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/2c266f49d95.pdfIn PDF document text
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/c668dc99e0a5.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/2491733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_6610a27e771348908a3260468ca616b7.pdf?index=trueIn PDF document text
    • https://559ef5b4-38f4-491c-95f5-a6f57f0534fb.filesusr.com/ugd/1b862a_09fd89f9017b45ae88df0fc38e8412de.pdf?index=trueIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_0e9e21202fee40cd9807c8a9690c3261.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_40fdee8c57a34838807c55897bbdd228.pdf?index=trueIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_f09d690cacc24b66ba84adf31024337c.pdf?index=trueIn 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_off0000ff46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 5444 bytes
SHA-256: a8c938a0546e23f180d8618ffaf0792fe4bb9dc1249574b5e1d3623c371e479f
font_01_sfnt_off000111be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BE 11100 bytes
SHA-256: 5ec9355abf5b6c33a295fc45576d85a8d7c4afcf7019bb7f630285acd7197ee6

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