Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14a9554e9cba586…

MALICIOUS

PDF

78.9 KB Created: 2021-05-07 18:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f077ececb7c79652fc51c20a4e7d3db1 SHA-1: d7edc1eb9a4bed843e5eca411c8a6ba127e2c8c7 SHA-256: e14a9554e9cba58652c6c12e00bd10f93a50fcb53bb1f4a07c92048dc1446ffd
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a mass of external links, with the primary suspicious URL being https://zajinet.ru/strik?utm_term=who+was+the+real+blackie+from+narcos. The document body is heavily obfuscated and appears to be a lure, likely intended to redirect users to malicious content or initiate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=who+was+the+real+blackie+from+narcos
    • http://samudevupogawi.iblogger.org/public_administration_masters_online_canada.pdf
    • https://sagupegijugix.weebly.com/uploads/1/3/4/4/134443219/bujuretis.pdf
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/biribu.pdf
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/kaleguto_vuviwop_xurezox.pdf
    • http://wuxifev.iblogger.org/45078342033.pdf
    • http://tumujosukilezu.22web.org/grid_and_cloud_computing_lab_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/murudute/template_thank_you_email_after_business_meeting.pdf
    • https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_65bdbc12c867482ba6063835f372c6ae.pdf?index=true
    • https://s3.amazonaws.com/zoluwivebiro/grade_11_ncert_chemistry_textbook.pdf
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_abad6eec903346d798adb8b3f06c0624.pdf?index=true
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_db80423cece74b27b873ff3baab2d812.pdf?index=true
    • http://fafaxuz.epizy.com/3478934604.pdf
    • http://rawelusovonifax.epizy.com/how_to_connect_laptop_to_kyocera_printer.pdf
    • https://s3.amazonaws.com/bulolimepol/tabla_de_verbos_en_ingles_regulares.pdf
    • https://s3.amazonaws.com/bojafazes/lagu_lily_versi_dangdut_stafaband.pdf
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_0a420e9dfebe488f8e5e6b57059cd535.pdf?index=true
    • http://fojofediwesifog.rf.gd/43867013925.pdf
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_a5c521e2b1234ef1bc2bde7184adf372.pdf?index=true
    • http://zaniwemikadas.rf.gd/bosch_plena_mixer_amplifier.pdf
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46e.bin
0f8fa55c27efdec2a27972ddc26f4843c801ac9c95f273c81ab22577845ef364		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46E 5428 bytes
font_01_sfnt_off000106d5.bin
59f9771830135c54ebe26584c78a339304470e0196209e04856f5791510f1a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 12212 bytes

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