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)
MD5: 2a66652b442082e01484b4cb05e77b67 SHA-1: dc5f788a749a19f66b489a48ce1e9dffdf4cd247 SHA-256: 3d133cb2f2fd2ed5ec1b4068a40376f00f9660e3ddae9f7771849dcce074c2ba
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 by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
    • https://cdn-cms.f-static.net/uploads/4471682/normal_60146cbfdbda2.pdf
    • http://mazikopipovix.mywebcommunity.org/how_to_reset_samsung_j7_software.pdf
    • https://cdn-cms.f-static.net/uploads/4377697/normal_602a28fad884d.pdf
    • https://static.s123-cdn-static.com/uploads/4375340/normal_60049058f25d5.pdf
    • https://cdn-cms.f-static.net/uploads/4367004/normal_6027a41768fb6.pdf
    • https://cdn-cms.f-static.net/uploads/4366980/normal_604b6d9a7671d.pdf
    • https://xavabijikuz.weebly.com/uploads/1/3/1/6/131636819/691aa45.pdf
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fdff2d119236.pdf
    • https://cdn-cms.f-static.net/uploads/4463532/normal_60241a911f307.pdf
    • http://peromopativej.mypressonline.com/the_paper_bag_princess_full_movie.pdf
    • https://static.s123-cdn-static.com/uploads/4418567/normal_60043b66cf467.pdf
    • http://sufulilutidake.mypressonline.com/pioneer_av_receiver_vsx-532_manual.pdf
    • http://rumafelaneli.mygamesonline.org/38754117449.pdf
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/wikowoxejipab.pdf
    • http://veviwumifuvemuz.mypressonline.com/pijixufule.pdf
    • https://xevumijujivo.weebly.com/uploads/1/3/1/3/131383583/kobefawazavama.pdf
    • http://bewewafip.scienceontheweb.net/the_killing_joke_ending_batgirl.pdf
    • https://static.s123-cdn-static.com/uploads/4464874/normal_5fe4550bac857.pdf
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/ketebisepivubakekij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vigexosav.myartsonline.com/38342567934.pdf
    • http://tibamupebunod.atwebpages.com/70504479859.pdf
    • https://94a77064-04c6-4d97-9d6e-28c1c4a7f7c7.filesusr.com/ugd/79e5df_9dfaca293b8e4a7eb60342f8e39c5adb.pdf?index=true
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_174896d7390344f498f44428b04ecf9a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c17.bin
0fa6c8d94754594c33f14e2e6746c3f8589281b69384ff53e34d975f32020467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C17 5384 bytes
font_01_sfnt_off00014e8f.bin
d7e302968c6f98cf7cf31fcced48679d5750c035f2e3456c20ff3b5dfde1d663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8F 10896 bytes
font_02_sfnt_off00017424.bin
c86dd2e8eb9073f5525c3b0ae269a7213f91b44edbf915aca2fe1d7e9d6d56b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17424 16144 bytes

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