Malicious PDF — malware analysis report

Static analysis result for SHA-256 99970c383b0481c5…

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 16:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6d7c87fee8f0ecdbd192c557485cedba SHA-1: 551f696ef66046dac955cbdcb848977079df3f8b SHA-256: 99970c383b0481c53edba8341998515286ef8362a8b6ea07a8a0af67aedb996d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external URIs, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=all+computer+parts+full+form+list+pdf PDF link annotation
    • http://aarbuz.space/83268864216zazcv.pdfIn PDF document text
    • https://matiposokatogu.weebly.com/uploads/1/3/0/7/130739068/4834300.pdfIn PDF document text
    • http://wodunobogigav.22web.org/data_visualization_tool_reporting.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/oV3HNoB/el_ambito_de_la_filosofia_practica.pdfIn PDF document text
    • https://xipumizi.weebly.com/uploads/1/3/4/7/134746986/nojibux.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/iifzhiS/agl_energy_market_cap.pdfIn PDF document text
    • http://theraisins.pro/38300951822shiox.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/cd95255c4696.pdfIn PDF document text
    • http://shoop-fo.ru/business_english_for_beginnersjp2gd.pdfIn PDF document text
    • http://reduslim-shop.website/73922190350ffkn0.pdfIn PDF document text
    • https://cdn.sqhk.co/pipagalax/F8ijjif/biker_mice_from_mars_2006_streaming_ita.pdfIn PDF document text
    • http://xidemapewa.22web.org/capsular_staining.pdfIn PDF document text
    • https://wolafufep.weebly.com/uploads/1/3/5/3/135305459/sozimuwali.pdfIn PDF document text
    • http://bratskpravojur.ru/lokedobuxajarafoguxazbkag4.pdfIn PDF document text
    • http://zofufina.22web.org/from_hell_alan_moore_ita.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/kunazabipofekuni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vivemowirarok.rf.gd/active_voice_and_passive_voice_chart.pdfIn PDF document text
    • http://jafolofip.epizy.com/69662156094.pdfIn PDF document text
    • http://rusozetowozo.epizy.com/acting_out_culture_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02bce7ab-a2e2-40bc-8671-ea59a26a07c1/romeo_and_juliet_film_leonardo_dicaprio_review.pdfIn PDF document text
    • http://tadufojisewito.epizy.com/myanmar_agenda_21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c0669a-2b7a-4265-b7c7-fdc09d7ac5b9/koderevupofubiva.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_off0000f944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 5288 bytes
SHA-256: f06d9a97af67394b8e69b6e970fd095f273441b61aaffc3227badc5fee9eb5d5
font_01_sfnt_off00010b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 10744 bytes
SHA-256: bedd3f7201ae47b766a89abdbd0871261960cc89784addfc894ac75d49cb9bdd

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