Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e54fb459ad35045…

MALICIOUS

PDF

70.2 KB Created: 2021-02-10 11:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7a14913bc36a657e787351f740e66f45 SHA-1: 164758b932972629181f68e25c4721a6afd25d89 SHA-256: 2e54fb459ad35045789b23b57c8ce2e12fe5ecf8fe9fbde03fcb5fb8313afe2b
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links pointing to external websites, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure align with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=bein%20sport%20turkey%20tv%20guide PDF link annotation
    • http://fujozed.22web.org/ad_hoc_networks_pearson.pdfIn PDF document text
    • http://xobezised.iblogger.org/megan_fox_transformers_movies.pdfIn PDF document text
    • http://xamawodub.22web.org/95854490982.pdfIn PDF document text
    • https://govobozof.weebly.com/uploads/1/3/5/3/135315692/13751911b6.pdfIn PDF document text
    • https://gevivefopunuxaf.weebly.com/uploads/1/3/4/3/134331765/pewakax.pdfIn PDF document text
    • http://pafugiwerokamez.iblogger.org/vapamoxasibegufarogo.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/22961947213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_5fe6867fbd254.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/7508751.pdfIn PDF document text
    • https://ruzudagozigiwis.weebly.com/uploads/1/3/5/3/135394236/28ee9c704.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/fagumezi.pdfIn PDF document text
    • https://zuwositoxo.weebly.com/uploads/1/3/5/3/135315809/7549689.pdfIn PDF document text
    • http://bibuwobu.22web.org/reading_comprehension_questions_and_answers.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/bulitafexo.pdfIn PDF document text
    • http://kovezemunoropu.iblogger.org/song_cashmere_cat_miss_you.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://menaronutex.epizy.com/accounts_payable_processor_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/sklearn_binary_classification_report.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/bengal_tiger_telugu_movie_song.pdfIn PDF document text
    • http://kiwuvapinemugi.rf.gd/alaipayuthey_movie_song_lyrics.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_off0000d638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 5160 bytes
SHA-256: 29bdb1d74b63e4a4ab33356bae8305a30ebeb0d6fa9de339d4ead7407db003d7
font_01_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 10732 bytes
SHA-256: 27cd5163aa950cd668514a7b0a5be26163ac6d4140479095385dea01432f0d30

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