Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a925b2cdacfde5…

MALICIOUS

PDF

94.7 KB Created: 2021-05-28 07:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9263f63f67f57368aaf2d24b16d07105 SHA-1: 50fc7c0d62e741b7aa8c966e8cfcbc98baaa7b00 SHA-256: d7a925b2cdacfde5f46d43eea604e42fa27bdec80b73f558a9689f77fc731065
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 0.9992

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://midufefew.ru/strik?utm_term=barcelona+vs+real+madrid+la+liga+17%252F18 PDF link annotation
    • https://nitagupivef.weebly.com/uploads/1/3/4/3/134342099/ed0cda2ba41ea1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fd091f885e37.pdfIn PDF document text
    • https://kofiserifopame.weebly.com/uploads/1/3/2/7/132741397/84e05.pdfIn PDF document text
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/jisevitukib.pdfIn PDF document text
    • https://saxetesaw.weebly.com/uploads/1/3/5/3/135301220/vokunavemoj-buvojavog-fonenonowozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_605177570732f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5ff229b037f8b.pdfIn PDF document text
    • https://zuwejuropuri.weebly.com/uploads/1/3/1/6/131606208/mitulizepi_viwebudutewive.pdfIn PDF document text
    • https://xitokudid.weebly.com/uploads/1/3/4/6/134688137/bebuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_600e4100e80cb.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/6005850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_6056cefdd5839.pdfIn PDF document text
    • https://tivubolo.weebly.com/uploads/1/3/1/8/131857038/8711912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_604cc10383e19.pdfIn PDF document text
    • https://jugifipunud.weebly.com/uploads/1/3/1/4/131437595/f4dd77c427dd35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601cd92c6e7ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_5fe6c198be28a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417033/normal_60099c8030c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_605fe3ee7799d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 3136 bytes
SHA-256: d7a74a8f7f5b6061d1704e49d55b25e97137b941398fa138ccd077d4d208d331
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 5728 bytes
SHA-256: 1e421f09aa9c1176d973003919eaa621e6af56e1fdd38f9b338bdf14c0dd32a2
font_02_sfnt_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 6340 bytes
SHA-256: b5a16e0e27fd7ec1e5233468ec2116f1103745af8dbc026963c8a600946cd635
font_03_sfnt_off0001201b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201B 3804 bytes
SHA-256: f3d21b122687babd99d7eaf0b7dcae4b834b9f3c731403152123d79163267b2d
font_04_sfnt_off00012e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E85 11624 bytes
SHA-256: f6e90dd36fceb3e1bca7e7399285ef86966b68a66a69337cdd7087d6113c3236
font_05_sfnt_off000155ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155CE 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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