Malicious PDF — malware analysis report

Static analysis result for SHA-256 1942cd0d6e63001f…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 23:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 820d4ae4ac2d994fcc9d69c80747f7e3 SHA-1: c7d100a078066b4c854285883859aab2c81b05c9 SHA-256: 1942cd0d6e63001fc4a215652bae79546c759582b34a29a086dc962ae4ee047b
66 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that redirects to a suspicious domain, masquerading as a search result for a technical question. This technique is often used to trick users into visiting malicious websites for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://bologen.ru/strik?utm_term=does+vizio+e55-e2+have+bluetooth PDF link annotation
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/44a48b53e76e5.pdfIn PDF document text
    • https://doxuxipineza.weebly.com/uploads/1/3/0/7/130740192/2da2f41b94.pdfIn PDF document text
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/3529894.pdfIn PDF document text
    • http://kobujiva.iblogger.org/mirae_asset_mutual_fund_factsheet.pdfIn PDF document text
    • http://xudisoda.66ghz.com/fofuzipe.pdfIn PDF document text
    • https://tifevijokob.weebly.com/uploads/1/3/5/3/135351552/remenirofupadupuvo.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/zafaronivaj/sokabimubodeto.pdfIn PDF document text
    • http://faberaladaruz.epizy.com/amenaza_de_aborto_minsa.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/nasalus.pdfIn PDF document text
    • http://kesurodijafezup.rf.gd/journal_le_matin_d_algrie_en.pdfIn PDF document text
    • http://jududupozibuj.rf.gd/oracle_hyperion_financial_management_user_s_guide.pdfIn PDF document text
    • http://tumemali.rf.gd/jumiwevanuxufisoxox.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/romeo_and_juliet_study_guide_questions_and_answers_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/advanced_cost_accounting_syllabus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 4992 bytes
SHA-256: 79071f9dadc36db50c330a936453f417894c2d8fc1a921b69d7ed6137f841756
font_01_sfnt_off0000f081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 11176 bytes
SHA-256: e70b807e2779a7d23864f7270bdd59f86db0f4f4e4e8ac5f03e510912f298779
font_02_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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