Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b9f27e34dc0651…

MALICIOUS

PDF

73.7 KB Created: 2021-01-24 14:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 64ac30dd304858b53b18a719ad9acc13 SHA-1: 00581b2d44d21b2d502036be3772e9f3c856eac8 SHA-256: 92b9f27e34dc0651b1f6149076a3e2c8faed6245420b9b927c70afe45165eea6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm, directing users to various PDF documents hosted on external sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://bologen.ru/123?utm_term=normas+de+asepsia+en+laboratorio+de+microbiologia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404285/normal_5ff416a1c889d.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/0UqhcsZ/gopatisuboseke.pdfIn PDF document text
    • https://fipuwetula.weebly.com/uploads/1/3/3/9/133997959/dojelawaxutiv_nemegofitasu_julupizefuz_gebunuge.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/iiehgd7/tennis_cricket_live_match_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/gcifhh1/parental_apps_for_tablets.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/pibefopa_denulafa_lufugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5fdbbbce39325.pdfIn PDF document text
    • https://foziwumiwogesis.weebly.com/uploads/1/3/5/3/135321673/wiberoxakepowoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/womirofop/32492310427.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/cartoon_network_app_free_for_pc.pdfIn PDF document text
    • http://lizolubemerawi.epizy.com/what_is_contemplated_means.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/hplc_agilent_1260_infinity_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/ahm_full_form_in_school.pdfIn PDF document text
    • http://vapovalexuma.epizy.com/repifurokemalexuwazuwa.pdfIn PDF document text
    • http://sudemididesiz.epizy.com/66832954223.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_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 5504 bytes
SHA-256: b6a40807b271430a5e57e0ae630d409ae981dbe16306a81fb5bf95cce665a9a4
font_01_sfnt_off0000f3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D3 11076 bytes
SHA-256: 881141488c8e90878aef6dc9425c2215e951a54d9d4a06c90edd5ead2107ee4d

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