Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf9e489f066212a…

MALICIOUS

PDF

74.9 KB Created: 2021-02-26 11:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 959b81825d09feb25c8fcc1c149f861e SHA-1: 121fa2d80f40d1dd08d7e84dd26db2d5ab9f17c4 SHA-256: 8cf9e489f066212a83b6c0b911996a5a8deb7d927daf8691736cb66fce96d84b
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure point towards an attempt to lure users to malicious sites.

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://botokaw.ru/award?keyword=quran+english+text+file PDF link annotation
    • http://vuwavutos.iblogger.org/kedafexebir.pdfIn PDF document text
    • http://milanbeachs.space/popori6wxy.pdfIn PDF document text
    • https://lurakowufo.weebly.com/uploads/1/3/4/4/134457973/3050021.pdfIn PDF document text
    • http://magnitoli-2ekran.site/fotudatokizzy2b4.pdfIn PDF document text
    • http://lidzadva.xyz/radicales_libres_cancervx2yr.pdfIn PDF document text
    • http://daddytestit.xyz/53872496436usfwt.pdfIn PDF document text
    • http://avtoshtorki.shop/4358768109mn3du.pdfIn PDF document text
    • http://reduslim-ufficiale.website/pifudojivikuvroc07.pdfIn PDF document text
    • https://sewajevujunu.weebly.com/uploads/1/3/2/8/132814136/2659504.pdfIn PDF document text
    • http://shoop-fm.ru/rekevituxukepanudejamsrlm6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vufagozujidivu.epizy.com/badmashi_attitude_status.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/tenses_worksheets_for_grade_6_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/kindergarten_worksheets_counting_to_10.pdfIn PDF document text
    • http://jopiwutipav.epizy.com/remesasunepitupuneza.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/kuk_university_date_sheet_3rd_sem_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/72601754309.pdfIn PDF document text
    • http://lexojowal.epizy.com/bepoxu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD379 5160 bytes
SHA-256: 1e10509737f2b6d8fedb2b8519f2e148da3e4cf163f04564642243c06dd01bdf
font_01_sfnt_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 10328 bytes
SHA-256: 445c2b581d23c45c478b163812be879759134ccfce1e5abda6f4ac09a96a7a28
font_02_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 16476 bytes
SHA-256: 43411e498b453e2d1a667ee626655ab4a6bd4452a866027a59bd89529de55458

Open this report in the interactive analyzer, or submit your own file for analysis.