Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d133cb2f2fd2ed5…

MALICIOUS

PDF

101.9 KB Created: 2021-03-15 10:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a66652b442082e01484b4cb05e77b67 SHA-1: dc5f788a749a19f66b489a48ce1e9dffdf4cd247 SHA-256: 3d133cb2f2fd2ed5ec1b4068a40376f00f9660e3ddae9f7771849dcce074c2ba
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://leonvi.ru/award?keyword=magnetic+bearing+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471682/normal_60146cbfdbda2.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/how_to_reset_samsung_j7_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_602a28fad884d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_60049058f25d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_6027a41768fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_604b6d9a7671d.pdfIn PDF document text
    • https://xavabijikuz.weebly.com/uploads/1/3/1/6/131636819/691aa45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fdff2d119236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463532/normal_60241a911f307.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/the_paper_bag_princess_full_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418567/normal_60043b66cf467.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/pioneer_av_receiver_vsx-532_manual.pdfIn PDF document text
    • http://rumafelaneli.mygamesonline.org/38754117449.pdfIn PDF document text
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/wikowoxejipab.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/pijixufule.pdfIn PDF document text
    • https://xevumijujivo.weebly.com/uploads/1/3/1/3/131383583/kobefawazavama.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/the_killing_joke_ending_batgirl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464874/normal_5fe4550bac857.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/ketebisepivubakekij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigexosav.myartsonline.com/38342567934.pdfIn PDF document text
    • http://tibamupebunod.atwebpages.com/70504479859.pdfIn PDF document text
    • https://94a77064-04c6-4d97-9d6e-28c1c4a7f7c7.filesusr.com/ugd/79e5df_9dfaca293b8e4a7eb60342f8e39c5adb.pdf?index=trueIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_174896d7390344f498f44428b04ecf9a.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
    • 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_off00013c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C17 5384 bytes
SHA-256: 0fa6c8d94754594c33f14e2e6746c3f8589281b69384ff53e34d975f32020467
font_01_sfnt_off00014e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8F 10896 bytes
SHA-256: d7e302968c6f98cf7cf31fcced48679d5750c035f2e3456c20ff3b5dfde1d663
font_02_sfnt_off00017424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17424 16144 bytes
SHA-256: c86dd2e8eb9073f5525c3b0ae269a7213f91b44edbf915aca2fe1d7e9d6d56b5