Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a3e06e5a8ccd20…

MALICIOUS

PDF

116.1 KB Created: 2021-03-14 10:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5ce0fc2378372c9dbcb5201f95afcae6 SHA-1: 5c1da90245158216723acb6a9ffe8eaebec872c1 SHA-256: d2a3e06e5a8ccd206165e0efd3c0ce51701869d3e9a1dc155f532483c5219323
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains metadata related to PDF generation and a title that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=que+significa+titulo+salvage+rosa PDF link annotation
    • http://hookup750.website/2979044355717enk.pdfIn PDF document text
    • http://899themes-demo.ru/7wdjpi.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/zakamenexavirisurukuteb.pdfIn PDF document text
    • http://vvd.bar/vunogewagsem5l.pdfIn PDF document text
    • http://pojibuvuj.mygamesonline.org/29736556015.pdfIn PDF document text
    • https://dizorewumuzesab.weebly.com/uploads/1/3/4/0/134012942/sijutajum.pdfIn PDF document text
    • http://strahuemsya.info/how_can_you_tell_vintage_levisgfj04.pdfIn PDF document text
    • http://kino-vezde.ru/fishbone_analysis_ppt_template8cd57.pdfIn PDF document text
    • http://jepegupunu.mygamesonline.org/numark_mixdeck_express_dj_controller.pdfIn PDF document text
    • http://manthoughtswebsite.website/23847734733r0hld.pdfIn PDF document text
    • http://lotsmen.com/jafazyzp9v.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/dujixok.pdfIn PDF document text
    • http://circulyarkadigital.xyz/33893750040sw84i.pdfIn PDF document text
    • http://powerhdniy.space/matogapirogamigetato1g7qx.pdfIn PDF document text
    • https://gimazujik.weebly.com/uploads/1/3/4/2/134235519/7812119.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/tibejowosojafefod.pdfIn PDF document text
    • http://leopolds.space/command_conquer_rivals_tm_pvpsa33d.pdfIn PDF document text
    • http://mebel-albero.ru/maserati_granturismo_mc_stradale_costr8r5m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kimone/what_is_the_chemical_name_for_sour_salt.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/android_toolbar_title_center_horizontal.pdfIn PDF document text
    • http://dirulibas.onlinewebshop.net/speaking_skills_importance.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_off00015f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4C 5052 bytes
SHA-256: 47e59ee4e7c4b43bbc349d374cf9ce85cfb0839d5f70ad2cf223c8582aa31bb1
font_01_sfnt_off00017095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17095 14192 bytes
SHA-256: 66dbabdd65a61ea55d6f7fe1126a01f8d8772695ca229520e67d4492cb866f92
font_02_sfnt_off00019d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D8C 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off0001b2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2BA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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