Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cb9849a125f4a2…

MALICIOUS

PDF

122.4 KB Created: 2021-03-25 01:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 44b17386d47a46b67aaca72d22cfa5e0 SHA-1: 5470ab9372ca9cccddab36a0ebf370521e5b6c8e SHA-256: e7cb9849a125f4a2f1090fcd613c3911a2b02b50969e3d1e0fdf1419b4bd326f
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 0.9997

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://druttle.ru/award?keyword=absorcion+y+distribucion+de+los+farmacos+pdf PDF link annotation
    • https://cdn.sqhk.co/nimabugokofa/eNYo9ic/bukisavalote.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/cBhkKhi/frogger_retro_level.pdfIn PDF document text
    • https://sagedawigaput.weebly.com/uploads/1/3/4/3/134336778/5644353.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/tamigaporipemez_gutulefibafari_rezujepizixasob.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/lapufemijerav.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/27c59.pdfIn PDF document text
    • https://tunizedudozep.weebly.com/uploads/1/3/4/5/134589181/ganazik_getiwenazudeba_kefixotaxe.pdfIn PDF document text
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/382598.pdfIn PDF document text
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/3bb1e6ff8357cec.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/gedimuta/bahubali_2_cartoon_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/lasonevu.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/15962321438.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/kolumab.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/psa_nitrogen_generator_working_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/metal_gear_solid_2_sons_of_liberty_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/aircraft_maintenance_engineer_apprentice_jobs_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/51140736673.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/86533580545.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/amazing_grace_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/nefemutitefev.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/silafivuzopifitagunebuwod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000185de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185DE 5532 bytes
SHA-256: 61fe83f064190aa927a8161a1ef622e0701f0725cb5bb4cc164327c1226ebe30
font_01_sfnt_off000198a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198A0 14296 bytes
SHA-256: 3abd6431c4b518ccf3784838be607a6d2dd0c9ed51b5335e24e86a92200bdf53
font_02_sfnt_off0001c4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4FD 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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