Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdbffbb8cf4eb5a…

MALICIOUS

PDF

79.1 KB Created: 2021-02-20 12:37:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2423267cba9c2761d5b11f0b478a3471 SHA-1: 7f099d98c2d529a074fce4ed901e175f18a4f8c2 SHA-256: ebdbffbb8cf4eb5aba5be45eed147e7be2a588a35d671064e883ac0889b072d8
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily truncated, contains keywords related to lotteries and free spells, reinforcing the scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://druttle.ru/wix?keyword=lottery+spells+that+work+for+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5fd17ca8aaaab.pdfIn PDF document text
    • https://nipoxumafoji.weebly.com/uploads/1/3/4/7/134717148/1861c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_601e17824b065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485318/normal_5fe373cd95af8.pdfIn PDF document text
    • http://ogranicbio.fun/xenes4zm5y.pdfIn PDF document text
    • https://rusaxexuratibu.weebly.com/uploads/1/3/2/6/132680860/kobunej-tosida.pdfIn PDF document text
    • http://itverys.space/jojo_moyes_after_you_sequel58dak.pdfIn PDF document text
    • http://nicechange.space/21629618156m20vg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_6022e98d558d7.pdfIn PDF document text
    • https://wexisuteki.weebly.com/uploads/1/3/4/6/134616275/paketixakabemujisu.pdfIn PDF document text
    • https://vefoduwuwi.weebly.com/uploads/1/3/4/9/134902927/wujirize_pulolafejomizug.pdfIn PDF document text
    • https://vugilove.weebly.com/uploads/1/3/4/2/134234765/motef-vuxazamej-napamonibuk-gevaluzabiwudoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_5fd11a495823c.pdfIn PDF document text
    • https://bonosojemigapa.weebly.com/uploads/1/3/0/7/130776366/xejagajixerofo-lulonitup.pdfIn PDF document text
    • https://sisexalixigana.weebly.com/uploads/1/3/5/3/135323773/sokesatojelapan.pdfIn PDF document text
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/8022131.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/mukij.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
    • https://s3.amazonaws.com/gorajikunobixi/ray_bradbury_the_veldt_questions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 4824 bytes
SHA-256: c2a78d0dc6d828417f21e27725da446a88d3846ee84c1f3bad0c31168eeebc5e
font_01_sfnt_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 10560 bytes
SHA-256: 3ff31ece5d033aa8eb55939d6a5ed8cf85e8102f9b985e401ed17e2ebbb63a56
font_02_sfnt_off00012158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12158 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3