Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dda602ede398c5…

MALICIOUS

PDF

70.8 KB Created: 2021-03-18 02:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f311c0961105b3932a6ac80275f1d592 SHA-1: 0e6f77ec235e9b688854fdc74d27b43d59c92744 SHA-256: 29dda602ede398c574683f7c87b513b9b785d0dce327dc235ccf038bb42b4d97
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified as 'https://resalured.ru/strik?utm_term=4+pics+1+word+level+2208'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://resalured.ru/strik?utm_term=4+pics+1+word+level+2208 PDF link annotation
    • http://saudiautoinsurance.com/drag_sports_bike_wallpapers_for_desktop5qulz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fc9a5465f551.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501193/normal_5ff6299fd8d80.pdfIn PDF document text
    • http://biomaniix.website/how_to_use_bose_tv_speaker_remote8pgey.pdfIn PDF document text
    • http://meetsoda.pro/66574369076grh7o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387939/normal_5ff1588f64e1d.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/spanish_civil_war_1936f8748.pdfIn PDF document text
    • http://vezerfa.xyz/kinarezelojubitinozameridw7qf.pdfIn PDF document text
    • http://kijalixozez.22web.org/libro_ciencias_sociales_1.pdfIn PDF document text
    • http://tazikuruwuwozu.22web.org/89179750335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_60419f432e012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tekudadi.rf.gd/96386239747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b12e78-a939-462f-ac11-5ab67b862244/color_a_course_in_mastering_the_art_of_mixing_colors.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/muwupa.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_c73d3ad3a04748e4b3b2bcf64059451f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomudufe/konugatalemixuvozajifu.pdfIn PDF document text
    • http://lemutuzuvaw.rf.gd/ias_topper_2019_answer_sheet.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_77272756837145b8b6e6d70281ec8ce7.pdf?index=trueIn PDF document text
    • http://gimokoso.epizy.com/92595454731.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_4506f7052c1d49a097cc152ccdbb0083.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d66ecf-391f-4dd5-9433-adb8a75c1b24/muwidukuwuporesapom.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/nejokov.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_9b5f0b95e82e4753962257667c6985e1.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C3 5524 bytes
SHA-256: ca4ad4f139386a36addc5e4e1f49c2204c3ee6ed7f664b04d15f0c4b6d50a88a
font_01_sfnt_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 10292 bytes
SHA-256: c569dd6bcc92f415d7e90ea16ee854e58f3c225e0ab10a4ea63d14a80f860618

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