Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e231191ec6898ed…

MALICIOUS

PDF

69.1 KB Created: 2021-01-05 04:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bbc203435409e7270a8351dc56c5b7a2 SHA-1: eb3a9b5a209c828047e06dff123c280f754952d1 SHA-256: 7e231191ec6898ed4aa6c45ac00f86905f2eb69633aea0f28063cdf6f926ceed
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, suggesting a link farm or phishing attempt disguised as educational content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/aws?utm_term=basic+electronics+aptitude+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/jenotefi/g35Tbid/emoji_puzzle_challenge_book.pdfIn PDF document text
    • https://wufotojinelulut.weebly.com/uploads/1/3/1/1/131164112/b18f88998c2.pdfIn PDF document text
    • https://xerirexu.weebly.com/uploads/1/3/4/5/134592073/9156696.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/porenakis.pdfIn PDF document text
    • https://motefeka.weebly.com/uploads/1/3/4/1/134108707/buxuvepiziroze-mevomev-wovigim-vewuzuj.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/pabibagov_domumobuvojenif_fuxib_fatut.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/pulavokaxe/xojuwajodinuvafij.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/xotiresekujemije.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/pdf_to_word_converter_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/4634589978.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/12525205637.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/icao_annex_14_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/go_math_2nd_grade_chapter_4.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/raregorafoni.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/kellogg_one_year_mba_employment_report.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_off0000d17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 5416 bytes
SHA-256: 11aa26203848d49defabe1c8e268c0a5c3150effe5f0246bf872be3feeb144e4
font_01_sfnt_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 10368 bytes
SHA-256: 62df30e9d97afff9ca4efd12d9341ece2171ed680631fd2315838b48a7570a88

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