Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07a6f40101a3e6d…

MALICIOUS

PDF

74.2 KB Created: 2021-02-19 08:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 30ed42e876e24cd0f2b8fd459315795a SHA-1: 7ab8e44155a56b19484b97280b08b9993817d00c SHA-256: d07a6f40101a3e6da3a5762095eff71495b540abe37c4e724af3e7c8d4cbd6c5
126 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 a machine learning model also indicated maliciousness. The document contains numerous links to external sites, many of which are hosted on disposable domains and appear to be part of a link farm designed to distribute malicious files, such as 'office_2019_standard_for_macy99og.pdf'. The embedded URLs suggest an attempt to trick users into downloading malware disguised as legitimate software or firmware updates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=d%2527link+dir+880l+latest+firmware PDF link annotation
    • http://sungo1.space/office_2019_standard_for_macy99og.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/zakigezulateb.pdfIn PDF document text
    • http://lazadacostumercenter.com/accounts_specific_project_for_class_12_cbse2cezg.pdfIn PDF document text
    • https://melazikadoxu.weebly.com/uploads/1/3/4/5/134594637/kujamixax-xurojijezi-rugudunuterub.pdfIn PDF document text
    • http://espaceabone.com/pinopetefimojunomer4hun4.pdfIn PDF document text
    • http://prostotit.site/pac_boxing_fight8rxdl.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/04b1a1a.pdfIn PDF document text
    • http://begdas.fun/35882020595qwqou.pdfIn PDF document text
    • http://mscgis.net/zevasipilexm1pg.pdfIn PDF document text
    • http://shopyou.online/354673135855c3bl.pdfIn PDF document text
    • http://epaytds.xyz/vukazuvixatapikapitinokoso3v5c.pdfIn PDF document text
    • https://zamokofoviwikaz.weebly.com/uploads/1/3/0/8/130815095/df9b6e8b807.pdfIn PDF document text
    • http://future-techno.ru/interview_questions_for_leadershiptv48c.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/bupofo-ludodamakokes.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/lofese/hello_world_flutter_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/solomon_islands_music.pdfIn PDF document text
    • http://barovupaxar.epizy.com/hd_photoshop_background_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/2015_mercedes_c250_coupe_owners_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 5580 bytes
SHA-256: e5cea7345dc5eb972dec3abb16cfc2ff1b18cc3acdb2cba652d1da22a04f8c15
font_01_sfnt_off0000f528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 11324 bytes
SHA-256: 35063e891f27722190cf4ee7a1394bca50f92db84faca5733436a791f179fe01

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