Malicious PDF — malware analysis report

Static analysis result for SHA-256 1811a176364238d1…

MALICIOUS

PDF

74.4 KB Created: 2021-06-11 22:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 278e77db12710934751aa25b285c25f9 SHA-1: 22f6a588eec0c53afbb20eb6b908883d7d6a3e21 SHA-256: 1811a176364238d1d7c094b392f55827c5f31374838d1c5f9dc1ea79485db952
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting services, and is identified as a link farm. The presence of external URIs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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://queure.ru/pbw?utm_term=premikudu+movie+mp3+songs PDF link annotation
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/2df81d.pdfIn PDF document text
    • https://gepolurur.weebly.com/uploads/1/3/4/6/134610134/b22c5d6072.pdfIn PDF document text
    • https://fowanexi.weebly.com/uploads/1/3/4/6/134648222/jidinaf_paxomebi.pdfIn PDF document text
    • https://nilezejexi.weebly.com/uploads/1/3/4/7/134737846/5634781e.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
    • http://niluputevi.pbworks.com/f/exercices_sur_les_angles_cm1_cm2.pdfIn PDF document text
    • http://degenazi.pbworks.com/f/gebumakazugipanupiwujuzex.pdfIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144687567/minecraft_superheroes_unlimited_mod_green_lantern.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144952023/free_wear_os_watch_faces.pdfIn PDF document text
    • http://fosodijo.pbworks.com/f/75729546399.pdfIn PDF document text
    • http://ronejoxerer.pbworks.com/w/file/fetch/144919239/article_worksheet_for_class_10.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/f/veziwepikanazojejepe.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/w/file/fetch/144499266/gefeguvabulesexepox.pdfIn PDF document text
    • http://pinurakus.pbworks.com/f/21325048409.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144729228/real_estate_finance_and_investments_risks_and_opportunities_edition_5.1_ebook.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144615549/4360103043.pdfIn PDF document text
    • http://poguvovuk.pbworks.com/f/amd_a4_9125_radeon_r3_drivers_download.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144457473/jharkhand_b.ed_entrance_exam_2021_syllabus.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/84053931988.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/zezejexivomukilimov.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

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_off0000d782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD782 5128 bytes
SHA-256: 3867296588091c6cd7e4a5ce79cf74f1bd1eeec8a59ca98b223014acfac0a7ec
font_01_sfnt_off0000e8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 11012 bytes
SHA-256: f64d01b9e2cb1718d081730a9bd6f2bfb9a46d03e79619528d060dcd6db44268
font_02_sfnt_off00010e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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