Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1ab9ec8b81d6ab…

MALICIOUS

PDF

81.0 KB Created: 2021-05-24 19:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2f84af7e5c766c9c7cb1a84022241d90 SHA-1: 130d6531e4c942d3c68c8228a3f8cf6dc128aba7 SHA-256: 0c1ab9ec8b81d6ab682daad5fa88fd3c161156bf23a15e5748e91b52bd47d86f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, characteristic of a link farm, designed to direct users to potentially malicious websites. The embedded URL and the document's apparent purpose suggest an attempt to drive traffic to a specific malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=problemas+de+distribucion+poisson+resueltos+pdf PDF link annotation
    • https://lizoxezubim.weebly.com/uploads/1/3/0/7/130776499/papovixogesido.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/xerigem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/mukumibekumemakenof.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/cablevision_long_island_channel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/84779061481.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/quality_risk_assessment_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f31747-b041-44c6-92d6-b2ca24419434/34894808043.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/28928113233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2904c11c-6d98-4c17-831b-946c607978b4/55864595942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8306ed51-2392-4fb9-b7c8-1263a87b70f4/84462097375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8806961-3ad0-46b5-bcc7-23eb18ff62d0/apache_camel_in_action_second_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/41075665365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5a8fc0-a815-4eef-bc89-7ad6ccd2e507/18689920153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4efb070b-32dc-42c3-b5a1-3a4b36de5d8b/what_are_the_different_types_of_errors.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/chemical_weathering_and_mechanical_weathering_differences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc87bf2-42cc-4ccf-9cb3-959c96bda5be/toshiba_model_dp5022-sd_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/android_games_top.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/short_essay_on_my_pet_dog_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b795850e-919c-40ad-98a6-a99582481f77/82807278762.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA88 5444 bytes
SHA-256: 6cc94474ee558b88c6053cea933fa5c01fc45f942542a546297b6a8f54367864
font_01_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 2092 bytes
SHA-256: 78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
font_02_sfnt_off0000f682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF682 12076 bytes
SHA-256: 8584af7486abc7a5f7650f6432fc3528dabdf65a753cb7753e84f720c7ba7014
font_03_sfnt_off00011e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E58 16296 bytes
SHA-256: 5561c4d82fbfca81a66c04c36e059cfbf7b6188384656767d3368d526b1af784

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