Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0856f61a6f2cb9…

MALICIOUS

PDF

73.6 KB Created: 2021-02-17 14:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c4298474a524ab8b62cc9fe6bed017d6 SHA-1: ed915e4d7b2ddc53bdc6467fb1bec1e08a9bf2d9 SHA-256: 6a0856f61a6f2cb9d527323513d6a780244e7319d8593a3d41f285f5a5ced537
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The document's structure and embedded links are designed to trick users into visiting these sites, likely to download further malicious content or steal credentials.

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://jottigo.ru/strik?utm_term=vox+ac15+handwired+used PDF link annotation
    • https://cdn.sqhk.co/vevigagexoxa/vijgjCR/fantasy_wolf_wallpapers_for_phone.pdfIn PDF document text
    • https://lujinelux.weebly.com/uploads/1/3/4/3/134361227/1127044.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/lojovu-nuxuf-maxemurukodomi-rerowozaneteke.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/Mnr2hio/app_android_mobile_data_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/IqJOicx/nokaminuvilozarosi.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/d642d79c417.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/hR1mhbo/99224110048.pdfIn PDF document text
    • http://twoup-viktoria.online/621311957122ojf3.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/7175310796f987.pdfIn PDF document text
    • http://1xbet-regi.site/ejercicio_de_figuras_literarias_resu39cgy.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/iejdxq8/my_centura_health_patient_portal_login.pdfIn PDF document text
    • http://nekretnine.site/33275886000ih1wz.pdfIn PDF document text
    • https://jepiweluzobadur.weebly.com/uploads/1/3/5/3/135300479/lumobozosoben.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/jugudasodusodekuj.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/juzazuxol.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/mirivawamasul.pdfIn PDF document text
    • http://helper-badges.com/envision_math_5th_grade_textbook_answersalooo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 5296 bytes
SHA-256: d5e7d3f34d005dab333000b581141bc1eb4909be0c831e8c2481002b6bc07e08
font_01_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 10672 bytes
SHA-256: c69f0ec2083e5edb87c4d71f162e7fd3c1b97f096eb25e26b2fa6de2fd72c2a4

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