Malicious PDF — malware analysis report

Static analysis result for SHA-256 010b8b99868d2832…

MALICIOUS

PDF

73.0 KB Created: 2021-09-15 09:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f0820136129dc6f8907c2878d6a39d45 SHA-1: 90a363a6307e114a7a371cf25867546d953631cb SHA-256: 010b8b99868d2832738e82e0dc29c02478f82fe9b4a942e5f1125f88d93b7588
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=football+strike+mod+apk+2020 PDF link annotation
    • http://vce34.ru/attachments/file/mowimosazubojorimifa.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16307626711352490775.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/wizalov.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/21106025077.pdfIn PDF document text
    • http://hidropro.hu/upload/desegiminoguvagotovazupas.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e2404bd64---38445821798.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/pisadusotenurujemiw.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/revijibigosumetinanijefu.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210906_CFC3B54F002FFAF9.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/24590587809.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161416b7d43418---10649467030.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/43762016157.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/77182016244.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/95416772865.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/njmmbked4om2gbj06tc40viqo0/wapagezimiminewotus.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/lidurikuvijitorogetinojev.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/fodamisobiwoditeloxuwi.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/puvuj.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/69416865014.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/71341982882.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/zituranuruxexupuvilid.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/b6a24ad628e9eb71c91626095140730d/naguborefufosavizodopoko.pdfIn PDF document text
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/jezizumavozejosinuju.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7A 10900 bytes
SHA-256: 6599030b1b002e35cab9200b09aa7fcf125a0ec42000f828d0fbc9dbfe4cb3bb
font_01_sfnt_off0000d389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 16872 bytes
SHA-256: eaf6f5280a40afdd12b6d8e224fafd89da70f2d4ba6c5bc962cd5fec8a7bb2f4
font_02_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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