Malicious PDF — malware analysis report

Static analysis result for SHA-256 767a26baaf87d67f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-16 19:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c64c1bb3775a1db8ea85e27a4b711ce SHA-1: 952d52ed965c9e983ff1902c1d6ff73a7ef24a4e SHA-256: 767a26baaf87d67f1eb2040e3ba4b3ca5b26929af421a189e6a2c8156d6aec65
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://gimoguvi.ru/award?keyword=ethnographic+research+pdf PDF link annotation
    • http://haifaiv.ru/62146212339c7n0u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_60216ba60c210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493597/normal_5fd88cb46cf59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_60335a7a163af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_601bb4cc9676e.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/negodipagep.pdfIn PDF document text
    • http://itslm.fun/bullying_causas_y_consecuenciasvp56a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380213/normal_60008a1568e75.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/mowasavokoluzebij.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/marcos_o_evangelho_dos_milagres_hernandes_dias_lopes.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/11634633882vq9ym.pdfIn PDF document text
    • https://vemekejafor.weebly.com/uploads/1/3/4/0/134012611/5887129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e614a0-3df1-43ac-bbf2-3cfb8b3d2845/tatoromapuxo.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/is_nigeria_a_free_country.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/vudizevobakov.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/longdean_school_hemel_hempstead_ofsted_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c2d47d-d977-4140-8843-163c2ecc0de6/85550418860.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/android_studio_adb_location_mac_os.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_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 5340 bytes
SHA-256: 6f4dde1e60f1f6b0b8a1dd990d2ac620587681894e701c5a13d96a5cb0dbd9ca
font_01_sfnt_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 10316 bytes
SHA-256: 83ca4878aa9e8b52882b85b929c3e628bf0bc28e56b2db7a4ffde9658d33510c

Open this report in the interactive analyzer, or submit your own file for analysis.