Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de55055d1f4be93…

MALICIOUS

PDF

132.0 KB Created: 2020-12-25 04:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8f7699dc154fbc3a16ae07f9b770123d SHA-1: 1131b7f88e326d3e7bc5c1e363f0de158c1b8d98 SHA-256: 0de55055d1f4be932ba382630e4d407828304a08e1f759666d015d584e4a16ab
156 Risk Score

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 0.9812

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://traffset.ru/strik?utm_term=two+dots+over+e+on+keyboard PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5fa8a9294d965.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/migifenakave.pdfIn PDF document text
    • https://duzigavejad.weebly.com/uploads/1/3/4/5/134513143/bd6be763297.pdfIn PDF document text
    • https://fatumusuwenufok.weebly.com/uploads/1/3/4/5/134578353/widobilolej.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/4091217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5fdb1423f123e.pdfIn PDF document text
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/9627990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/woneketelak/properties_of_cathode_rays.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/hero_wars_gold_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/behavior_observation_checklist_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/osmanl_imparatorluu_tarihi_ahmet_cevdet_paa.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/troy_bilt_tiller_manual_1980.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/hotmail_my_account_has_been_hacked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf93553-e133-4939-86d5-92c5fda7abb1/62959469397.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F97 3096 bytes
SHA-256: d8c24a964bc0e60a5f66a2bea7dbd4d3a8fa0ea68dce133f8c8d5d67a31428fa
font_01_sfnt_off00015ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC3 5192 bytes
SHA-256: 47473e6fd94a8b6a5d67616fd09dd158434ca666a74bda3b14d72da724a2eab7
font_02_sfnt_off00016c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C92 4044 bytes
SHA-256: 4b37e2d0cf764ed2bd2e04c03ccff071c1f67288bd52da2d901245483a23f346
font_03_sfnt_off00017945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17945 2672 bytes
SHA-256: a310139fec887fef5ee98325a69ee259624fd447b0e34720db0445e75c706f22
font_04_sfnt_off000183cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183CC 2196 bytes
SHA-256: bcb64721b4bc900c29419657eb4913b20b54c015d9d961c109e62ee4d9983121
font_05_sfnt_off00018d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D26 28928 bytes
SHA-256: 3bb94452a3c7d58d204ae9aa3269ff5d178325b9ff6ffe08e19a93ee7ee6f284
font_06_sfnt_off0001d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9A2 16448 bytes
SHA-256: d0ee87c7b45a4fb925692d478a11ace345739889e8b970241fe3ebfe59c9ce06
font_07_sfnt_off0001f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F017 6344 bytes
SHA-256: 4434753894ff4d766407996a92e12c4d0e035fcd12a14ceecc0760674bf72022